MLA

Geldzahler, Henry, 1935-1994. Christopher Wilmarth: correspondence, photos, faxes regarding Geldzahler's Wilmarth exhibition at DIA Bridgehampton. Box 20, folder 13.18. circa 1945-1996. https://collections.library.yale.edu/catalog/17185213.

APA, 6th edition

Geldzahler, Henry, 1935-1994. (["Box 20, folder 13.18"])(circa 1945-1996)[Christopher Wilmarth: correspondence, photos, faxes regarding Geldzahler's Wilmarth exhibition at DIA Bridgehampton]. https://collections.library.yale.edu/catalog/17185213.