MLA

Padgett, Ron, 1942-. Micellaneous Letters. Box 2. 1960s-1970s. https://collections.library.yale.edu/catalog/17217888.

APA, 6th edition

Padgett, Ron, 1942-. (["Box 2"])(1960s-1970s)[Micellaneous Letters]. https://collections.library.yale.edu/catalog/17217888.