MLA

Granger, Lester B. (Lester Blackwell), 1896-1976. American Community: A Dynamic Process. Box 1, folder 2-4. 1955. https://collections.library.yale.edu/catalog/16750162.

APA, 6th edition

Granger, Lester B. (Lester Blackwell), 1896-1976. (["Box 1, folder 2-4"])(1955)[American Community: A Dynamic Process]. https://collections.library.yale.edu/catalog/16750162.