Most research papers fall into one of three categories: analytical, expository, or argumentative. If you’re presenting an analysis of information, then your paper is analytical. If you’re writing to explain information, then your paper is expository. If you’re arguing a conclusion, then it’s argumentative or persuasive. Your thesis statement should match the type of paper you’re writing.
MLA format is typically used for literary research papers and uses a ‘works cited’ page at the end. This format requires in-text citations.
The introduction is, in many respects, the conclusion written in reverse: start by generally introducing the larger topic, then orient the reader in the area you’ve focused on, and finally, supply the thesis statement. Avoid repeating exact phrases that you already used in the conclusion.
A research paper is an expanded essay that presents your own interpretation or evaluation or argument. When you write an essay, you use everything that you personally know and have thought about a subject. When you write a research paper you build upon what you know about the subject and make a deliberate attempt to find out what experts know. A research paper involves surveying a field of knowledge in order to find the best possible information in that field. And that survey can be orderly and focused, if you know how to approach it. Do not worry--you would not get lost in a sea of sources.