MLA

Erdoes, Richard, 1912-. Shells, Beach, Ocean. Box 77 | Florida, Long Boat Key, New Orleans. 1973, undated. https://collections.library.yale.edu/catalog/2100088.

APA, 6th edition

Erdoes, Richard, 1912-. (["Box 77 | Florida, Long Boat Key, New Orleans"])(1973, undated)[Shells, Beach, Ocean]. https://collections.library.yale.edu/catalog/2100088.