Three cowgirls racing their horses down the track at the Round-Up, Pendleton, Oregon, ca. 1910

Chicago citation style
Bowman, W. S. (Walter S.). Three cowgirls racing their horses down the track at the Round-Up, Pendleton, Oregon, ca. 1910. ca. 1910. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/alaskawcanada/id/1858. (Accessed June 21, 2018.)
APA citation style
Bowman, W. S. (Walter S.), (ca. 1910) Three cowgirls racing their horses down the track at the Round-Up, Pendleton, Oregon, ca. 1910. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/alaskawcanada/id/1858
MLA citation style
Bowman, W. S. (Walter S.). Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/alaskawcanada/id/1858>.
Note: These citations are programmatically generated and may be incomplete.