MLA

Toomer, Jean, 1894-1967. Locke, Alain LeRoy. Box 5, folder 151. 1922-23, n.d.. https://collections.library.yale.edu/catalog/16725492.

APA, 6th edition

Toomer, Jean, 1894-1967. (["Box 5, folder 151"])(1922-23, n.d.)[Locke, Alain LeRoy]. https://collections.library.yale.edu/catalog/16725492.