Cite

Map of Long Island / Geo H. Walker & Co.

MLA

Walker, Geo. H., and Co. Map of Long Island / Geo H. Walker & Co. The Company, 1897. https://collections.library.yale.edu/catalog/15827618.

APA, 6th edition

Walker, G. H., & C. (1897). Map of Long Island / Geo H. Walker & Co. [Maps]. The Company, https://collections.library.yale.edu/catalog/15827618.