MLA

Erdoes, Richard, 1912-2008. "Santa Clara 1988-1989". Box 63. 1975-1989, undated. https://collections.library.yale.edu/catalog/2089419.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 63"])(1975-1989, undated)["Santa Clara 1988-1989"]. https://collections.library.yale.edu/catalog/2089419.