The Key of the South, showing Fort Pickens and vicinity, positions of forts, batteries, fleet & soundings of every part of Pensacola Bay/ By M.K. Couzens, Litho. Lang & Laing.
MLA
The Key of the South, Showing Fort Pickens and Vicinity, Positions of Forts, Batteries, Fleet & Soundings of Every Part of Pensacola Bay/ By M.K. Couzens, Litho. Lang & Laing. W. Schaus, 1861. https://collections.library.yale.edu/catalog/15811403.
APA, 6th edition
The Key of the South, showing Fort Pickens and vicinity, positions of forts, batteries, fleet & soundings of every part of Pensacola Bay/ By M.K. Couzens, Litho. Lang & Laing. (1861). [Maps]. W. Schaus, https://collections.library.yale.edu/catalog/15811403.
