Always check with your instructor for specifics on your assignment, but typically certain disciplines use a particular style:
MLA: English, Art History, Music, Religion, Language
APA: Nursing, Psychology, Education, Social Sciences
Chicago-Turabian: History
Keep track of your sources for all your quotes and paraphrasing from the moment you start your paper.
Highlight the portions of text you've used and/or mark them with sticky notes.
Write down your quotes or paraphrasing with their corresponding sources on note cards.
Make sure you cite your sources in the text of your paper, as well as in your references/works cited/bibliography page.
Whatever method you choose, don't wait until you're done writing your paper to start your references page!
Paraphrasing is very useful for writing papers. It can help you develop a flow to your paper and avoid using a lot of quotes. You can also gain a better understanding of the passage when you put it in your own words. But remember: even if you paraphrase your source's material into your own words, you still need to cite your sources. Here are some resources to help you paraphrase effectively:
There are many tools that you can use to help you with your citation. Remember that these tools are only as good as the information you put in - they can't check for accuracy. Make sure you double check all your citations before submitting your assignment.