MLA

Malinowski, Bronislaw, 1884-1942. Powdermaker, Florence. Box 7, folder 511, reel 4 | reel 4U. 1933 January 27. https://collections.library.yale.edu/catalog/32502276.

APA, 6th edition

Malinowski, Bronislaw, 1884-1942. (["Box 7, folder 511, reel 4 | reel 4U"])(1933 January 27)[Powdermaker, Florence]. https://collections.library.yale.edu/catalog/32502276.