Notebooks, letters, file cards, personal addresses and phone numbers
MLA
Holtzman, Harry, 1912-1987. Notebooks, letters, file cards, personal addresses and phone numbers. Box 6. 1945-1987. https://collections.library.yale.edu/catalog/10773867.
APA, 6th edition
Holtzman, Harry, 1912-1987. (["Box 6"])(1945-1987)[Notebooks, letters, file cards, personal addresses and phone numbers]. https://collections.library.yale.edu/catalog/10773867.