MLA

Fagin, Larry, 1937-2017. Hamilton, Alfred Starr. Box 7, folder 253-254. circa 1975. https://collections.library.yale.edu/catalog/17208404.

APA, 6th edition

Fagin, Larry, 1937-2017. (["Box 7, folder 253-254"])(circa 1975)[Hamilton, Alfred Starr]. https://collections.library.yale.edu/catalog/17208404.