MLA

Wharton, Edith, 1862-1937. "Pavillion Colombe," St. Brice sous Forêt, France. Box 55, folder 1632-41. n.d.. https://collections.library.yale.edu/catalog/2012211.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 55, folder 1632-41"])(n.d.)["Pavillion Colombe," St. Brice sous Forêt, France]. https://collections.library.yale.edu/catalog/2012211.