MLA format is typically used for literary research papers and uses a ‘works cited’ page at the end. This format requires in-text citations.
If you find one really awesome book or journal that fits your topic perfectly, try looking in the works cited/bibliography/reference list at the end of it. This should contain many more books and journals that are about your topic as well.
Every type has a different aim. An argumentative work has to show a few sides of a particular issue and provides arguments in favor of one of them, a definition project aims to provide a clear explanation and analysis of one specific matter. Cause and effect research paper writing requires you to present a logical chain of causes and effects that relate to the selected issue, while reports simply outline a study (or studies) that were conducted previously. Interpretive papers are similar to definition ones. Compare and contrast ones, as a rule, describe the same issue from the perspectives of two different authors (scientists), while analytical research paper writing requires you to create a deep analytics of various opinions regarding the same issue.
If you are struggling to come up with a topic that feels “just right,” ask your professor or coworkers/classmates for advice. They will likely have great ideas that, even if they aren’t options for you to choose, can inspire you with new ideas. Asking a professor for help may seem frightening, but if they are worth anything as a professor, they want you to be successful with your work, and will do what they can to make that happen.