Untitled (classroom of students standing & doing exercises)

Chicago citation style
Untitled (classroom of students standing & doing exercises). 1890. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/cf95jn88q. (Accessed July 16, 2018.)
APA citation style
(1890) Untitled (classroom of students standing & doing exercises). Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/cf95jn88q
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/cf95jn88q>.
Note: These citations are programmatically generated and may be incomplete.