MLA

Erdoes, Richard, 1912-2008. "Santa Clara Mattachine 1977". Box 63. 1977-1984, undated. https://collections.library.yale.edu/catalog/2089746.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 63"])(1977-1984, undated)["Santa Clara Mattachine 1977"]. https://collections.library.yale.edu/catalog/2089746.