Cite

"Pedro Mary’s Son Born W.K."

MLA

Erdoes, Richard, 1912-2008. "Pedro Mary’s Son Born W.K.". Box 74. 1974-1989, undated. https://collections.library.yale.edu/catalog/2097688.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 74"])(1974-1989, undated)["Pedro Mary’s Son Born W.K."]. https://collections.library.yale.edu/catalog/2097688.