Cite

Plan of San Francisco / copied and enlarged from the original of Wm. M. Eddy's, city surveyor, by H. Ehrenberg, surveyor.

MLA

Eddy, William M. Plan of San Francisco / Copied and Enlarged from the Original of Wm. M. Eddy's, City Surveyor, by H. Ehrenberg, Surveyor. Wm. Endicott & Co., 0AD. https://collections.library.yale.edu/catalog/15818743.

APA, 6th edition

Eddy, W. M. (0 C.E.). Plan of San Francisco / copied and enlarged from the original of Wm. M. Eddy's, city surveyor, by H. Ehrenberg, surveyor. [Maps]. Wm. Endicott & Co., https://collections.library.yale.edu/catalog/15818743.