4 letters to Richard L. Purdy
MLA
Purdy, Richard Little, 1904-1990. 4 letters to Richard L. Purdy. Box 24, folder 771. 1933-34. https://collections.library.yale.edu/catalog/16482210.
APA, 6th edition
Purdy, Richard Little, 1904-1990. (["Box 24, folder 771"])(1933-34)[4 letters to Richard L. Purdy]. https://collections.library.yale.edu/catalog/16482210.