MLA

Wilson, Edmund, 1895-1972. Pasternak, Boris Leonidovich, "Doktor Zhivago," fragment, typescript, corrected, photocopy. Box 170, folder 4265. n.d.. https://collections.library.yale.edu/catalog/17083252.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 170, folder 4265"])(n.d.)[Pasternak, Boris Leonidovich, "Doktor Zhivago," fragment, typescript, corrected, photocopy]. https://collections.library.yale.edu/catalog/17083252.