MLA

Bontemps, Arna, 1902-1973. Jackman, Harold. Box 1, folder 16. 1934-42. https://collections.library.yale.edu/catalog/16730682.

APA, 6th edition

Bontemps, Arna, 1902-1973. (["Box 1, folder 16"])(1934-42)[Jackman, Harold]. https://collections.library.yale.edu/catalog/16730682.