MLA

Macleod, Norman, 1906-1985. Millspaugh, Margaret. Box 24, folder 251. 1976-1984. https://collections.library.yale.edu/catalog/17206868.

APA, 6th edition

Macleod, Norman, 1906-1985. (["Box 24, folder 251"])(1976-1984)[Millspaugh, Margaret]. https://collections.library.yale.edu/catalog/17206868.