Map of the valley of Mexico, with a plan of the defences of the capital and the line of operations of the United States Army under Major General Scott in August and September 1847 / surveyed and drawn by Lieut. M.L. Smith and Brevt. Capt. E.L.F. Hardcastl
MLA
Smith, M. L., and Lieut. Map of the Valley of Mexico, with a Plan of the Defences of the Capital and the Line of Operations of the United States Army under Major General Scott in August and September 1847 / Surveyed and Drawn by Lieut. M.L. Smith and Brevt. Capt. E.L.F. Hardcastl. s.n., 184AD. https://collections.library.yale.edu/catalog/15822283.
APA, 6th edition
Smith, M. L., & L. (184 C.E.). Map of the valley of Mexico, with a plan of the defences of the capital and the line of operations of the United States Army under Major General Scott in August and September 1847 / surveyed and drawn by Lieut. M.L. Smith and Brevt. Capt. E.L.F. Hardcastl [Maps]. s.n., https://collections.library.yale.edu/catalog/15822283.