Cite

All clowns are masked and all personae

MLA

Schwartz, Delmore, 1913-1966. All clowns are masked and all personae. Box 3, folder 149. undated. https://collections.library.yale.edu/catalog/17405209.

APA, 6th edition

Schwartz, Delmore, 1913-1966. (["Box 3, folder 149"])(undated)[All clowns are masked and all personae]. https://collections.library.yale.edu/catalog/17405209.