APA Style:
Example:
Slifer, D. (2014, October 27). Plane, clouds, moon, spots, sun
[Photograph]. Retrieved from
http://apod.nasa.gov/apod/astropix.html
Title of Government Agency. (Year, Month Day). Title of the article on
webpage. Retrieved from URL
Example:
National Aeronautics and Space Administration, Goddard Space Flight
Center. (2013, March). The Electromagnatic Spectrum. Retrieved
from http://imagine.gsfc.nasa.gov
Name of Producer or Director. (Director). (year of publication). Title of Video
[Video file]. Retrieved from URL
Example: