MLA

Erdoes, Richard, 1912-2008. "Vera Piki Making". Box 72. undated. https://collections.library.yale.edu/catalog/2096323.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 72"])(undated)["Vera Piki Making"]. https://collections.library.yale.edu/catalog/2096323.