Protesters marching in support of the United Farm Workers during a grape boycott rally in Seattle, Washington, December 19, 1969

Chicago citation style
Wallen, Don, Unidentified. Protesters marching in support of the United Farm Workers during a grape boycott rally in Seattle, Washington, December 19, 1969. 1969. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/hupy/id/1158. (Accessed April 25, 2018.)
APA citation style
Wallen, Don, Unidentified, (1969) Protesters marching in support of the United Farm Workers during a grape boycott rally in Seattle, Washington, December 19, 1969. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/hupy/id/1158
MLA citation style
Wallen, Don, Unidentified. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/hupy/id/1158>.
Note: These citations are programmatically generated and may be incomplete.