MLA

Simpson, Randolph Linsly, 1927-1992. Underwood & Underwood, New York; Ottawa, Kansas "14276-Harvesting hops in American River Basin, Berkins, Cal." Stereograph, grey card. Box 13, folder 659. undated. https://collections.library.yale.edu/catalog/32582649.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 659"])(undated)[Underwood & Underwood, New York; Ottawa, Kansas "14276-Harvesting hops in American River Basin, Berkins, Cal." Stereograph, grey card]. https://collections.library.yale.edu/catalog/32582649.