R2 offers citations in the APA style that you can copy and paste into your document.
When you've found an entry that you would like to cite click on the "Tools" button at the top of the screen.
Click on the "Export Citation" button.
Select the "APA Format" option. You can copy the citation by highlighting the text and using the "right-click" on your mouse and selecting Copy from the menu or by pressing the Ctrl and C buttons at the same time. Paste the citation in your document to save.