MLA

Hughes, Langston, 1902-1967. Adelphi College. Box 2, folder 38. 1950-61. https://collections.library.yale.edu/catalog/32604474.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 2, folder 38"])(1950-61)[Adelphi College]. https://collections.library.yale.edu/catalog/32604474.