MLA

Holtzman, Harry, 1912-1987. "Transformation" notes, articles, postcards, correspondence, and photographs of travels. Box 12. 1945-1987. https://collections.library.yale.edu/catalog/2040444.

APA, 6th edition

Holtzman, Harry, 1912-1987. (["Box 12"])(1945-1987)["Transformation" notes, articles, postcards, correspondence, and photographs of travels]. https://collections.library.yale.edu/catalog/2040444.