All of these refer to APA 6th edition. Make sure to use APA 7th edition style for your references.
For any item (book, article, etc.) included in OneSearch, click on the title. Then, you can get the citation by clicking on
on the right side of the screen. Scroll down for different citation styles.
Click on the title of the source. Look for a link that says "Cite" or "CiteNow" or "Citation Tools."
For pre-formatted citations for books, go to Worldcat.org. Find the book you want to cite. Click on Cite/Export. Click on the + for the style you need (APA, MLA, etc.) Copy and paste the citation!