MLA

Erdoes, Richard, 1912-2008. "Bad Men Shootings Mayhem". Box 77. 1976, undated. https://collections.library.yale.edu/catalog/2099980.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 77"])(1976, undated)["Bad Men Shootings Mayhem"]. https://collections.library.yale.edu/catalog/2099980.