MLA

Ford, Charles Henri, 1908-2002. Photographs of Gotham Book Mart. Box 5, folder 300. n.d.. https://collections.library.yale.edu/catalog/2077322.

APA, 6th edition

Ford, Charles Henri, 1908-2002. (["Box 5, folder 300"])(n.d.)[Photographs of Gotham Book Mart]. https://collections.library.yale.edu/catalog/2077322.