MLA

West, Rebecca, 1892-1983. Lawrence, Frieda. Box 11, folder 480. 1930. https://collections.library.yale.edu/catalog/16479156.

APA, 6th edition

West, Rebecca, 1892-1983. (["Box 11, folder 480"])(1930)[Lawrence, Frieda]. https://collections.library.yale.edu/catalog/16479156.