"My Mind to Me a Kingdom Is"
MLA
Schwartz, Delmore, 1913-1966. "My Mind to Me a Kingdom Is". Box 3, folder 174. 1950. https://collections.library.yale.edu/catalog/17405227.
APA, 6th edition
Schwartz, Delmore, 1913-1966. (["Box 3, folder 174"])(1950)["My Mind to Me a Kingdom Is"]. https://collections.library.yale.edu/catalog/17405227.