There are a number of websites you may need to cite for a paper, including standard webpages, online articles, online books, forum posts, and blogs. Here is an explanation of how to properly cite these website sources in the APA style.. Include the date of retrieval. Introduce the date with the word Retrieved.. Type the date in month-day-year format, and follow with a comma. 1  How to cite a website in APA. (2012, December 31).