You may indeed are encouraged to read outside sources on your theorists. In any event, you must do your own work and use your own words. Do not quote anybody, and do not copy material out of books or off the Internet. Passing off someone else's words as your own is called plagiarism, which is an academic offense. Further, be neat and attentive to detail.
Sloppy writing is closely related to sloppy thinking.
The final paper is different, however. In it, you are to write a dialogue for a discussion taking place hypothetically in the SUB in which the participants are Emile Durkheim, Max Weber, Karl Marx, Niccolo Machiavelli and yourself. You have just entered the SUB and find the others, who by now your friends, arguing. You are about to graduate from college, and a discussion develops about your future. Write the dialogue of this discussion in which all of you participate in analyzing your future.