MLA

Sanborn-Perris Map Co., issuing body. Insurance Maps of Waterbury, New Haven Co., Connecticut., Insurance Maps of Waterbury, New Haven Co., Connecticut: [New and Additional Sheets]. 0AD. https://collections.library.yale.edu/catalog/11687446.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (0 C.E.). Insurance maps of Waterbury, New Haven Co., Connecticut., Insurance maps of Waterbury, New Haven Co., Connecticut: [New and additional sheets]. [Atlases--Connecticut--Waterbury--1901, Cadastral maps--Connecticut--Waterbury--1901, Fire insurance maps--Connecticut--Waterbury--1901]. https://collections.library.yale.edu/catalog/11687446.