How do I cite a PowerPoint presentation in APA citation style?
According to the OWL at Purdue APA Guide, which can be found via the library's Citing and Writing research guide http://library.uhd.edu/apa Online lecture notes and presentation slides should be cited as follows:
When citing online lecture notes, be sure to provide the file format in brackets after the lecture title (e.g. PowerPoint slides, Word document).
Hallam, A. Duality in consumer theory [PDF document]. Retrieved from Lecture Notes Online Web site: http://www.econ.iastate.edu/classes/econ501/Hallam/
Roberts, K. F. (1998). Federal regulations of chemicals in the environment [PowerPoint slides]. Retrieved from http://siri.uvm.edu/ppt/40hrenv/index.html