MLA

Wilder, Amos Niven, 1895-1993. Photographs. Box 82, folder 988. undated. https://collections.library.yale.edu/catalog/10595890.

APA, 6th edition

Wilder, Amos Niven, 1895-1993. (["Box 82, folder 988"])(undated)[Photographs]. https://collections.library.yale.edu/catalog/10595890.