MLA

Van Vechten, Carl, 1880-1964. Eastman, Daniel, and Ida Rauh at their home in Provincetown, Massachusetts. Box 346, folder 4541. 1936 July 31. https://collections.library.yale.edu/catalog/2034072.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 346, folder 4541"])(1936 July 31)[Eastman, Daniel, and Ida Rauh at their home in Provincetown, Massachusetts]. https://collections.library.yale.edu/catalog/2034072.