There are a number of different citation styles available such as APA, Chicago, IEEE, MLA etc. Please check with each of your professors which style they require you to use in their class.
Our writing and citation guides can give you information on the various citation styles as well as guidance on reference management tools (EndNote, RefWorks, etc.).
If you aren't sure where to start you can use the citations basic tutorial.
Some websites can create citations and bibliographies for you. Most of them are free to use, but some require a subscription, or will have ads you need to watch to access the content.
Even if you are using a citation generator, it is important to double-check the final result for accuracy. Remember to cite each source as you use it, and ensure the information you are providing is correct.