[Topographic military map of region around Orange Courthouse, south to Mechanicsburg, east to Robertson's tavern, north to Madison C.H. and west to Burtonsville] / Office of Surveys and Maps for the Army of the Potomac.
MLA
[Topographic Military Map of Region around Orange Courthouse, South to Mechanicsburg, East to Robertson's Tavern, North to Madison C.H. and West to Burtonsville] / Office of Surveys and Maps for the Army of the Potomac. 1863. https://collections.library.yale.edu/catalog/15811272.
APA, 6th edition
[Topographic military map of region around Orange Courthouse, south to Mechanicsburg, east to Robertson's tavern, north to Madison C.H. and west to Burtonsville] / Office of Surveys and Maps for the Army of the Potomac. (1863). [Maps]. https://collections.library.yale.edu/catalog/15811272.