Bearded protester lies on the grass in front of hand painted protest signs, San Francisco, California, April 24, 1971

Chicago citation style
Wallen, Don, Unidentified. Bearded protester lies on the grass in front of hand painted protest signs, San Francisco, California, April 24, 1971. 1971. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/hupy/id/591. (Accessed October 24, 2018.)
APA citation style
Wallen, Don, Unidentified, (1971) Bearded protester lies on the grass in front of hand painted protest signs, San Francisco, California, April 24, 1971. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/hupy/id/591
MLA citation style
Wallen, Don, Unidentified. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/hupy/id/591>.
Note: These citations are programmatically generated and may be incomplete.