MLA

WYBC (Radio station : New Haven, Conn.). Newsletters. Box 23, folder 143. 1958-1962. https://collections.library.yale.edu/catalog/33504100.

APA, 6th edition

WYBC (Radio station : New Haven, Conn.). (["Box 23, folder 143"])(1958-1962)[Newsletters]. https://collections.library.yale.edu/catalog/33504100.