MLA

Hargrave, and Gubelman. Archibald Campbell Niven. 1887. https://collections.library.yale.edu/catalog/2040485.

APA, 6th edition

H., & G. (1887). Archibald Campbell Niven [Cabinet photographs, Clippings, Photographic prints, Photographs, Studio portraits]. https://collections.library.yale.edu/catalog/2040485.