MLA

Plowden, David (1932). Aaron Morgan, Running Back, South Haven Rams (Varsity High School Football Team). South Haven, Michigan (992-883). Box 28. 1992 September. https://collections.library.yale.edu/catalog/2040121.

APA, 6th edition

Plowden, David (1932). (["Box 28"])(1992 September)[Aaron Morgan, Running Back, South Haven Rams (Varsity High School Football Team). South Haven, Michigan (992-883)]. https://collections.library.yale.edu/catalog/2040121.