"Rock and Cloud, Kings River Canyon (Proposed as a national park)," California, 1936.

Chicago citation style
Department of the Interior. National Park Service. Branch of Still and Motion Pictures.??. "Rock and Cloud, Kings River Canyon (Proposed as a national park)," California, 1936.. 1936. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/519927. (Accessed December 19, 2018.)
APA citation style
Department of the Interior. National Park Service. Branch of Still and Motion Pictures.??, (1936) "Rock and Cloud, Kings River Canyon (Proposed as a national park)," California, 1936.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/519927
MLA citation style
Department of the Interior. National Park Service. Branch of Still and Motion Pictures.??. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/519927>.
Note: These citations are programmatically generated and may be incomplete.