MLA

Wheeler, Monroe, 1899-1988. Sheean, Dinah. Box 11, folder 300. 1964. https://collections.library.yale.edu/catalog/17064458.

APA, 6th edition

Wheeler, Monroe, 1899-1988. (["Box 11, folder 300"])(1964)[Sheean, Dinah]. https://collections.library.yale.edu/catalog/17064458.