MLA

Beinecke, Edwin J. (Edwin John), 1886-1970. "The Scientific Ape" (6831). Box 42, folder 922. undated. https://collections.library.yale.edu/catalog/2044526.

APA, 6th edition

Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 42, folder 922"])(undated)["The Scientific Ape" (6831)]. https://collections.library.yale.edu/catalog/2044526.