Images, diagrams and artistic works should be cited as you would cite any other type of work.
Note:
Tip: You should give as much information as possible about the images that you have used, including these basics:
General Format
In-Text Citation (Paraphrase):
(Artist Surname, Year)
In-Text Citation (Quotation):
(Artist Surname, Year)
References:
Artist Surname, First Initial. Second Initial. (Year). Title of the artwork [Format]. Title of the Website. URL (address of web site)
References (No Author):
Title of work [Type of work]. (Year image was created). Title of the Website. URL (address of web site)
References (No Author, No Title, No Date):
[Subject and type of work]. Title of the Website. URL (address of web site)
Many images found on the Web fall under this category. Try to locate the missing information by clicking on the image, and/or looking at the bottom of the image.
Example
In-Text Citation (Paraphrase):
(Baumel, 2010)
In-Text Citation (Quotation):
(Baumel, 2010)
References (Basic):
Baumel, A. (2010). Cholera treatment center in Haiti [Online image]. Doctors Without Borders. https://www.doctorswithoutborders.org
References (No Author):
Flu epidemic [Online image]. (1919). History. http://www.history.net/photo/flu-epidemic-art/collections
References (No Author, No Title, No Date):
[Untitled illustration of a sleeping dog]. Sleeping Animals. http://www.sleepinganimals/pix.com