MLA

Murphy, Gerald, 1888-1964. Murphy family with Ernest Hemingway and Pauline Pfeiffer, L Bar T Ranch, Montana. Box 30, folder 593. 1932 August. https://collections.library.yale.edu/catalog/16638172.

APA, 6th edition

Murphy, Gerald, 1888-1964. (["Box 30, folder 593"])(1932 August)[Murphy family with Ernest Hemingway and Pauline Pfeiffer, L Bar T Ranch, Montana]. https://collections.library.yale.edu/catalog/16638172.