MLA

Erdoes, Richard, 1912-2008. "Tsankavi". Box 72. 1974-1987, undated. https://collections.library.yale.edu/catalog/2096560.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 72"])(1974-1987, undated)["Tsankavi"]. https://collections.library.yale.edu/catalog/2096560.