MLA

Map, Sanborn, and issuing body Publishing Co. Bethel, Conn. 1889. https://collections.library.yale.edu/catalog/11034853.

APA, 6th edition

Map, S., & Publishing Co., issuing body. (1889). Bethel, Conn. [Atlases, Bethel, Cadastral maps, Connecticut, Fire insurance maps, local]. https://collections.library.yale.edu/catalog/11034853.