H.K. Caskey, Executive Secretary, American Headquarters, Peking University
MLA
H.K. Caskey, Executive Secretary, American Headquarters, Peking University. 0AD. https://collections.library.yale.edu/catalog/17105468.
APA, 6th edition
H.K. Caskey, Executive Secretary, American Headquarters, Peking University. (0 C.E.). [Photographs (AAT)]. https://collections.library.yale.edu/catalog/17105468.