MLA

Gounod Society (New Haven, Conn.). Programs and clippings. Box 1, folder 1. 1887-1919. https://collections.library.yale.edu/catalog/32551291.

APA, 6th edition

Gounod Society (New Haven, Conn.). (["Box 1, folder 1"])(1887-1919)[Programs and clippings]. https://collections.library.yale.edu/catalog/32551291.