MLA

Stewart, Donald Ogden, 1894-1980. "Hollywood Now" newsletters. Box 24. 1937-1939. https://collections.library.yale.edu/catalog/16233055.

APA, 6th edition

Stewart, Donald Ogden, 1894-1980. (["Box 24"])(1937-1939)["Hollywood Now" newsletters]. https://collections.library.yale.edu/catalog/16233055.