MLA

Whiting, Charles J. Map of Vallejo, California / Surveyed by Chas. J. Whiting, Surveyor General of the State of California, by Order of the Legislature. Lith. of Wm. Endicott & Co., 1850. https://collections.library.yale.edu/catalog/15818788.

APA, 6th edition

Whiting, C. J. (1850). Map of Vallejo, California / surveyed by Chas. J. Whiting, Surveyor General of the State of California, by order of the Legislature. [Maps]. Lith. of Wm. Endicott & Co., https://collections.library.yale.edu/catalog/15818788.