To cite an electronic resource, it is always a good idea to keep a copy of the URL or DOI. Below is the information you will need (if available) to cite an electronic resource correctly.
Use the following format:
Felluga, Dino. Guide to Literary and Critical Theory. Purdue U, 28 Nov. 2003, www.cla.purdue.edu/english/theory/. Accessed 10 May 2006.
Lundman, Susan. “How to Make Vegetarian Chili.” eHow, www.ehow.com/how_10727_make-vegetarian-chili.html. Accessed 6 July 2015.
Machiavelli, Niccolo. The Prince, translated by W. K. Marriott, Kindle ed., Library of Alexandria, 2018.
Klee, Paul. Twittering Machine. 1922. Museum of Modern Art, New York. The Artchive, www.artchive.com/artchive/K/klee/twittering_machine.jpg.html. Accessed May 2006.
Langhamer, Claire. “Love and Courtship in Mid-Twentieth-Century England.” Historical Journal, vol. 50, no. 1, 2007, pp. 173-96. ProQuest, https://doi.org/10.1017/S0018246X06005966. Accessed 27 May 2009.
McGonigal, Jane. “Gaming and Productivity.” YouTube, uploaded by Big Think, 3 July 2012, www.youtube.com/watch?v=mkdzy9bWW3E.