MLA

Wescott, Glenway, 1901-1987. "Robert Frost, Culture Hero" notebook. Box 297, folder 2929. ca. 1961-63. https://collections.library.yale.edu/catalog/2000085.

APA, 6th edition

Wescott, Glenway, 1901-1987. (["Box 297, folder 2929"])(ca. 1961-63)["Robert Frost, Culture Hero" notebook]. https://collections.library.yale.edu/catalog/2000085.