Reconnaissance of the battle field at Bull Run, Va., fought July 21, 1861 / made on March 14, 1862 by Henry L. Abbot, 1st Lieut. Top. Engineers.
MLA
Abbot, Henry L. Reconnaissance of the Battle Field at Bull Run, Va., Fought July 21, 1861 / Made on March 14, 1862 by Henry L. Abbot, 1st Lieut. Top. Engineers. Corps of Topographical Engineers?, 1862. https://collections.library.yale.edu/catalog/15811293.
APA, 6th edition
Abbot, H. L. (1862). Reconnaissance of the battle field at Bull Run, Va., fought July 21, 1861 / made on March 14, 1862 by Henry L. Abbot, 1st Lieut. Top. Engineers. [Maps]. Corps of Topographical Engineers?, https://collections.library.yale.edu/catalog/15811293.
