[Letter: Cole Porter to Gerald Murphy]
MLA
Porter, Cole, 1891-1964. [Letter: Cole Porter to Gerald Murphy]. Box 8 | Folder 136. 1945 May 17. https://collections.library.yale.edu/catalog/10716698.
APA, 6th edition
Porter, Cole, 1891-1964. (["Box 8 | Folder 136"])(1945 May 17)[[Letter: Cole Porter to Gerald Murphy]]. https://collections.library.yale.edu/catalog/10716698.