MLA

Erdoes, Richard, 1912-2008. "Anhinga Long". Box 79. 1973, undated. https://collections.library.yale.edu/catalog/2101711.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 79"])(1973, undated)["Anhinga Long"]. https://collections.library.yale.edu/catalog/2101711.