Surveys and miscellanea
MLA
Wilfred, Thomas, 1889-1968. Surveys and miscellanea. Box 16, folder 222. 1938-1940. https://collections.library.yale.edu/catalog/10015943.
APA, 6th edition
Wilfred, Thomas, 1889-1968. (["Box 16, folder 222"])(1938-1940)[Surveys and miscellanea]. https://collections.library.yale.edu/catalog/10015943.