MLA

Geldzahler, Henry, 1935-1994. Miscellaneous Essays. Box 1, folder 49. 1966-1982. https://collections.library.yale.edu/catalog/11249200.

APA, 6th edition

Geldzahler, Henry, 1935-1994. (["Box 1, folder 49"])(1966-1982)[Miscellaneous Essays]. https://collections.library.yale.edu/catalog/11249200.