MLA

Erdoes, Richard, 1912-2008. Anti FBI Ralley, Hanay. Box 55 | Hokahay, Indian Civil Rights. undated. https://collections.library.yale.edu/catalog/2084203.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 55 | Hokahay, Indian Civil Rights"])(undated)[Anti FBI Ralley, Hanay]. https://collections.library.yale.edu/catalog/2084203.