MLA

Morath, Inge, 1923-2002. Styron, William. Box 154. 1966-1974. https://collections.library.yale.edu/catalog/17366075.

APA, 6th edition

Morath, Inge, 1923-2002. (["Box 154"])(1966-1974)[Styron, William]. https://collections.library.yale.edu/catalog/17366075.