MLA

Searle, S. W., and cartographer. Map of the City of New Haven, Connecticut. Published by Eneas Smith, W.H. Rease's Lithographic Establishment, N.E. cor. 4th & Chestnut St., 1859. https://collections.library.yale.edu/catalog/15827427.

APA, 6th edition

Searle, S. W., & cartographer. (1859). Map of the city of New Haven, Connecticut [Maps]. Published by Eneas Smith, W.H. Rease's Lithographic Establishment, N.E. cor. 4th & Chestnut St. https://collections.library.yale.edu/catalog/15827427.