Two Mexican workers signing a book

Chicago citation style
Higgins, Floyd Halleck, 1886-1975, Photographer. Two Mexican workers signing a book. 1942 Oct. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2j49r6tx. (Accessed December 10, 2018.)
APA citation style
Higgins, Floyd Halleck, 1886-1975, Photographer, (1942 Oct) Two Mexican workers signing a book. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2j49r6tx
MLA citation style
Higgins, Floyd Halleck, 1886-1975, Photographer. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt2j49r6tx>.
Note: These citations are programmatically generated and may be incomplete.