MLA

Beinecke, Edwin J. (Edwin John), 1886-1970. "Notes of Childhood," with notes regarding its use by Graham Balfour. Box 74, folder 1814. undated. https://collections.library.yale.edu/catalog/16609952.

APA, 6th edition

Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 74, folder 1814"])(undated)["Notes of Childhood," with notes regarding its use by Graham Balfour]. https://collections.library.yale.edu/catalog/16609952.