MLA

Erdoes, Richard, 1912-2008. Wildflowers, General. Box 85 | New Mexico Nature, Flora. 1975-1992, undated. https://collections.library.yale.edu/catalog/2105923.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 85 | New Mexico Nature, Flora"])(1975-1992, undated)[Wildflowers, General]. https://collections.library.yale.edu/catalog/2105923.