MLA

Asakawa, Kan'ichi, 1873-1948. Photograph of Kan'ichi Asakawa. Box 1, folder 8. undated. https://collections.library.yale.edu/catalog/10016583.

APA, 6th edition

Asakawa, Kan'ichi, 1873-1948. (["Box 1, folder 8"])(undated)[Photograph of Kan'ichi Asakawa]. https://collections.library.yale.edu/catalog/10016583.