The EC library has online guides to these most popular citation styles:
Don't see the citation type you're looking for? The full versions of each style guide are available in the library. Get the call number from the box at left.
Online citation generators can be useful, however they are often wrong. Feel free to use them for a first draft, but double check your citations using one of the trusted sources in this guide. Don't just copy and paste - your instructor will be able to tell!