MLA

Van Vechten, Carl, 1880-1964. Stanley, Kim, as Elizabeth von Ritter in A Far Country, play by Henry Denker. Box 376, folder 5461. 1961 August 1. https://collections.library.yale.edu/catalog/10058628.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 376, folder 5461"])(1961 August 1)[Stanley, Kim, as Elizabeth von Ritter in A Far Country, play by Henry Denker]. https://collections.library.yale.edu/catalog/10058628.