Map of the state of Virginia / compiled from the best authorities and printed at the Coast Survey Office, A.D. Bache, supdt. ; compiled by W.L. Nicholson ; lith. by Chas. G. Krebs.
MLA
Nicholson, W. L. Map of the State of Virginia / Compiled from the Best Authorities and Printed at the Coast Survey Office, A.D. Bache, Supdt. ; Compiled by W.L. Nicholson ; Lith. by Chas. G. Krebs. The Office, 1863. https://collections.library.yale.edu/catalog/15811251.
APA, 6th edition
Nicholson, W. L. (1863). Map of the state of Virginia / compiled from the best authorities and printed at the Coast Survey Office, A.D. Bache, supdt. ; compiled by W.L. Nicholson ; lith. by Chas. G. Krebs. [Maps]. The Office, https://collections.library.yale.edu/catalog/15811251.