MLA

Backus, Isaac, 1724-1806. The substance of an address to an Assembly in Bridgewater, March 10, 1779 previous to the administration of baptism. Box 5, folder 11. 1779. https://collections.library.yale.edu/catalog/33530979.

APA, 6th edition

Backus, Isaac, 1724-1806. (["Box 5, folder 11"])(1779)[The substance of an address to an Assembly in Bridgewater, March 10, 1779 previous to the administration of baptism]. https://collections.library.yale.edu/catalog/33530979.