MLA

Murphy, Gerald, 1888-1964. Photograph postcards. Box 39, folder 746. 1920s. https://collections.library.yale.edu/catalog/10604602.

APA, 6th edition

Murphy, Gerald, 1888-1964. (["Box 39, folder 746"])(1920s)[Photograph postcards]. https://collections.library.yale.edu/catalog/10604602.