Protesters hold signs

Chicago citation style
Kluetmeier, Heinz. Protesters hold signs. 1968-03-16. Retrieved from the Digital Public Library of America, http://content.mpl.org/cdm/ref/collection/HstoricPho/id/6524. (Accessed November 21, 2019.)
APA citation style
Kluetmeier, Heinz, (1968-03-16) Protesters hold signs. Retrieved from the Digital Public Library of America, http://content.mpl.org/cdm/ref/collection/HstoricPho/id/6524
MLA citation style
Kluetmeier, Heinz. Retrieved from the Digital Public Library of America <http://content.mpl.org/cdm/ref/collection/HstoricPho/id/6524>.
Note: These citations are programmatically generated and may be incomplete.