MLA

Mann, Fredric R. (Fredric Rand), 1903-1987. Bridgeport Public Schools certificate. Box 55, folder 1. 1910. https://collections.library.yale.edu/catalog/33485750.

APA, 6th edition

Mann, Fredric R. (Fredric Rand), 1903-1987. (["Box 55, folder 1"])(1910)[Bridgeport Public Schools certificate]. https://collections.library.yale.edu/catalog/33485750.