MLA

Erdoes, Richard, 1912-2008. Alligator. Box 79 | Everglades 1973. 1973, undated. https://collections.library.yale.edu/catalog/2101613.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 79 | Everglades 1973"])(1973, undated)[Alligator]. https://collections.library.yale.edu/catalog/2101613.