Map of battle field of August 10th 1898 : between U.S. regular troops under Brig. Genl. Theodore Schwan, U.S. Volunteers and Spanish forces under Col. Julio Soto Villanueva, Alfonso XIII.
MLA
Division, United States. Adjutant-General's Office. Military Information. Map of Battle Field of August 10th 1898 : between U.S. Regular Troops under Brig. Genl. Theodore Schwan, U.S. Volunteers and Spanish Forces under Col. Julio Soto Villanueva, Alfonso XIII. Norris Peters Co. Photo-litho, 0AD. https://collections.library.yale.edu/catalog/15832252.
APA, 6th edition
Division, U. S. A.-G. O. M. I. (0 C.E.). Map of battle field of August 10th 1898 : between U.S. regular troops under Brig. Genl. Theodore Schwan, U.S. Volunteers and Spanish forces under Col. Julio Soto Villanueva, Alfonso XIII. [Maps]. Norris Peters Co. Photo-litho, https://collections.library.yale.edu/catalog/15832252.