MLA

Williams, William Carlos, 1883-1963. "Conversation with William Carlos Williams," interview transcript, typescript draft. Box 79, folder 1602. 1953. https://collections.library.yale.edu/catalog/17049614.

APA, 6th edition

Williams, William Carlos, 1883-1963. (["Box 79, folder 1602"])(1953)["Conversation with William Carlos Williams," interview transcript, typescript draft]. https://collections.library.yale.edu/catalog/17049614.