You can access Chabot Library's new APA handout here. Or you can come in and ask the reference librarian for a hard copy of the handbooks. To look up DOIs for online articles go to: https://www.crossref.org/guestquery/
This video from David Rice Library will help you determine when and why you need to cite.
You Quote It, You Cite It! is Las Positas Library's adaptation of the Acadia University Library's tutorial on avoiding plagiarism. Click here to take the tutorial.
There are some citation generators that can save you some time. ALWAYS double check these citations against examples from a style guide. It's easy to plug information into the wrong section. Here are some generators that I suggest: