MLA

Bowen, Croswell, 1905-1971. Scrapbook. Box 7 (Oversize), folder 167. n.d.. https://collections.library.yale.edu/catalog/2053045.

APA, 6th edition

Bowen, Croswell, 1905-1971. (["Box 7 (Oversize), folder 167"])(n.d.)[Scrapbook]. https://collections.library.yale.edu/catalog/2053045.