MLA

General, United States. Surveyor. Sketch of the Public Surveys in the State of Wisconsin and Territory of Minnesota. Lith. of J. Bien,, Surveyor General's Office; 1860. https://collections.library.yale.edu/catalog/15814556.

APA, 6th edition

General, U. S. S. (1860). Sketch of the public surveys in the state of Wisconsin and territory of Minnesota. [Maps]. Lith. of J. Bien,, Surveyor General's Office; https://collections.library.yale.edu/catalog/15814556.