Citation managers help you to quickly create, store, and access your citations. Some allow you to store your research documents and auto-generate bibliographies. Below are examples of online citation managers commonly used by students.
Mendeley is a free reference manager and academic social network. Make your own fully-searchable library in seconds, cite as you write, and read and annotate your PDFs on any device.
This resource from North Carolina State University creates citations after you enter aspects of your source into a form. Select the appropriate style for your works cited from the results.