If you want more in-depth information, there are plenty of books about the literature review process. Some keywords that might help you locate this kind of material include:
Here are some examples:
A literature review is an evaluative process that that allows you to address your research question.
Often, it is formalized and written down, as for this course in the annotated bibliography. Here's what the literature review covers:
The literature review allows you to demonstrate due diligence in addressing these two questions. Is there similar research literature that address the issue you’re studying—why are these publications important and why do they tell us something that could apply to your question?
Have you been able (through the literature review) to identify questions that published research does not answer? In other words, can you now make a case for why further study of your research question is important to the field?
Harvard University Graduate School of Education, Literature Review: A Research Journey instructional video.
Clearly, you'll be most concerned with the content of published material you evaluate as part of the literature review.
Here are some other issues to consider as you decide whether or not it is an appropriate source to reference in your research: