Cite

[Military topographical map of country east and about Warrenton, VA].

MLA

[Military Topographical Map of Country East and about Warrenton, VA]. Office of Surveys and Maps for the Army of the Potomac , 1863. https://collections.library.yale.edu/catalog/15811279.

APA, 6th edition

[Military topographical map of country east and about Warrenton, VA]. (1863). [Maps]. Office of Surveys and Maps for the Army of the Potomac , https://collections.library.yale.edu/catalog/15811279.