MLA

Van Vechten, Carl, 1880-1964. D'Alvarez, Marguerite, with Paul Moor and Clément Richer at Marché aux Puces de Saint-Ouen, Paris, France. Box 88, folder 1502. 1949 October 9. https://collections.library.yale.edu/catalog/2027395.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 88, folder 1502"])(1949 October 9)[D'Alvarez, Marguerite, with Paul Moor and Clément Richer at Marché aux Puces de Saint-Ouen, Paris, France]. https://collections.library.yale.edu/catalog/2027395.