MLA

Geldzahler, Henry, 1935-1994. Geldzahler portrait. Box 26, folder 30. circa 1960. https://collections.library.yale.edu/catalog/2012811.

APA, 6th edition

Geldzahler, Henry, 1935-1994. (["Box 26, folder 30"])(circa 1960)[Geldzahler portrait]. https://collections.library.yale.edu/catalog/2012811.