MLA

Hartley, Marsden, 1877-1943. Sparhawk-Jones, Elizabeth. Box 13. 1938-1942. https://collections.library.yale.edu/catalog/16723435.

APA, 6th edition

Hartley, Marsden, 1877-1943. (["Box 13"])(1938-1942)[Sparhawk-Jones, Elizabeth]. https://collections.library.yale.edu/catalog/16723435.