To cite an online classroom, such as an online lecture, PPT, PDF, or other online classroom material, use the following APA format: Author A. (date). Title of post [Description of form]. Retrieved from http://www.xxxWhen citing online lecture notes, be sure to provide the file format in brackets. (e.g. word document, PowerPoint slides, Online lecture). Example: Petersen, D. (2017, February 13). Clinical correlate: psoriasis [Online lecture]. Retrieved from ;