MLA

Erdoes, Richard, 1912-2008. "Strip Mining. Box 62. 1977, undated. https://collections.library.yale.edu/catalog/2088578.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 62"])(1977, undated)["Strip Mining]. https://collections.library.yale.edu/catalog/2088578.