Cowboys on horseback moving a bull at the Round Up, Pendleton, Oregon, ca. 1912

Chicago citation style
Marcell, Edward F.. Cowboys on horseback moving a bull at the Round Up, Pendleton, Oregon, ca. 1912. ca. 1912. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/alaskawcanada/id/1847. (Accessed July 16, 2018.)
APA citation style
Marcell, Edward F., (ca. 1912) Cowboys on horseback moving a bull at the Round Up, Pendleton, Oregon, ca. 1912. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/alaskawcanada/id/1847
MLA citation style
Marcell, Edward F.. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/alaskawcanada/id/1847>.
Note: These citations are programmatically generated and may be incomplete.