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One thing to keep in mind is that there are many different types of sources you might encounter. Information comes in many different formats, all with different publication processes, level of oversight and verification, purpose, and audience. Depending on how you are searching for information (e.g., using a search engine like Google or searching in a research database like PubMed), you might encounter a lot of sources that you will not be able to use!
Information like this tends to be extremely easy to publish with little to no oversight or verification. Because of this, they are considered as a whole to be less credible or trustworthy than other types of information. That's not to say that they can't contain accurate information, but there are no standard processes in place for verifying the content and they are not considered part of the scholarly literature. These kinds of materials are typically freely and easily available through search engines. Typically, you should not be citing things like these in your research or lab papers.
These sources typically have a bit more oversight than the previous category, but mostly in terms of copyediting and not verification of information. Many articles report on current or recent events but don't present research. They may talk about a new research study that was published in a scholarly journal, but the writing style will be geared more towards the general public and it will not report results. These are also not considered part of the scholarly literature. They may or may not be freely and easily available through a search engine; some publications may allow you to read all their articles for free, some will let you read some amount of articles for free, some will only be available to subscribers. Some of these will be available through the Miami Libraries' subscriptions, but since they are not considered scholarly, you probably shouldn't cite them for your research or lab papers.
These fall into categories: fiction and non-fiction, and within non-fiction there are generally scholarly and non-scholarly (it should hopefully go without saying that fiction books are not considered scholarly in your field). Non-scholarly books could be written by journalists or non-specialists, but there are some non-scholarly books written by scientists. If they are written for the general public and not for other experts, that's a good indication that a book or chapter is non-scholarly. If they contains lots of jargon, lots of additional sources, and generally read like they were written for other experts, that's a good indication that they are scholarly. However, this category can be difficult for students to identify. When in doubt, ask your professor or librarian if it's appropriate to cite.
Scholarly journals are where you will find peer-reviewed research articles. These can be either primary, original research or secondary research, aka review articles. Peer-reviewed articles will be published in journals that have names like Science, Nature, Journal of Experimental Biology, etc. Several articles will be collected and published together in a single issue, and there are usually several issues per volume. Most journals publish issues on a monthly or quarterly basis, so there might be twelve or four issues per volume. Some will be more frequent, others will be less frequent. This information is important to include in the end reference for an article, so you should always find and verify the volume, issue, and page numbers for an article you want to cite.
Be careful! Not everything published in a scholarly journal has undergone full peer review. Most journals will also publish things like commentaries from readers on papers it has previously published, letters to the editor, and book reviews.
There are other types of information that tend to fall somewhere between one or more of these broad categories, but unless you are specifically allowed to use them, you should only be citing peer-reviewed articles.