"Boys"
MLA
Erdoes, Richard, 1912-2008. "Boys". Box 43. 1975-1977, undated. https://collections.library.yale.edu/catalog/10251058.
APA, 6th edition
Erdoes, Richard, 1912-2008. (["Box 43"])(1975-1977, undated)["Boys"]. https://collections.library.yale.edu/catalog/10251058.