Cite

"Little Bighorn Medicine Rock"

MLA

Erdoes, Richard, 1912-2008. "Little Bighorn Medicine Rock". Box 62. undated. https://collections.library.yale.edu/catalog/2089105.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 62"])(undated)["Little Bighorn Medicine Rock"]. https://collections.library.yale.edu/catalog/2089105.