You may be asked to use different citation styles in different classes. Different styles were created to highlight the information that's most important to a given audience - for example, MLA uses page numbers for in-text citations, while Vancouver's abbreviated journal titles saves space in print. Clear citations make it easier for your audience to follow up on interesting sources you mention.
There are two ways to approach citations -
The library recommends 2 free citation management tools
Zotero is a standalone software program that works with Firefox, Chrome and Safari. It allows users to:
Mendeley is a free citation and file management application. It allows you to: