MLA

Erdoes, Richard, 1912-2008. Picnic Medium. Box 63 | Navajo Families, Ginger Hillis, Hubbels. 1975. https://collections.library.yale.edu/catalog/2090019.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 63 | Navajo Families, Ginger Hillis, Hubbels"])(1975)[Picnic Medium]. https://collections.library.yale.edu/catalog/2090019.