List the URL of the website including "http://..." in parentheses within the text. For example, if you're citing a line from an article within the text, your citation would look like this:
"The space satellite has orbited the planet Mars since June, 15, 2009 (http://www.nasa.com)."
Construct an out-of-text reference in the bibliography using the following format:
Author's last name, author's first initial. (Year). Online article title. Website title.
Retrieved from [website URL].
Example:
Smith, J. (2001). Riding With Rex. The Smithsonian.
Retrieved from http://blogs.smithsonianmag.com/dinosaur/2011/06/riding-with-rex/.
Write a citation for a website with no author using the following format:
Online article title. (Year). Retrieved [date], from [website URL]
Example:
First Test Orion Crew Module Shipped Out. (2011). Retrieved June 15, 2001, from http://www.nasa.gov/mission_pages/constellation/orion/