Map of the battle fields of Manassas and the surrounding region showing the various actions of the 21st July, 1861, between the armies of the Confederate States and the United States / surveyed and drawn by W.G. Atkinson, acting 1st Lieut. Engineers. ; ph
MLA
Atkinson, W. G. Map of the Battle Fields of Manassas and the Surrounding Region Showing the Various Actions of the 21st July, 1861, between the Armies of the Confederate States and the United States / Surveyed and Drawn by W.G. Atkinson, Acting 1st Lieut. Engineers. ; Ph. 0AD. https://collections.library.yale.edu/catalog/15811294.
APA, 6th edition
Atkinson, W. G. (0 C.E.). Map of the battle fields of Manassas and the surrounding region showing the various actions of the 21st July, 1861, between the armies of the Confederate States and the United States / surveyed and drawn by W.G. Atkinson, acting 1st Lieut. Engineers. ; ph [Maps]. https://collections.library.yale.edu/catalog/15811294.