MLA

The Situation in the Causcasus and Central Asia : from Information Received to August 25. Base Printing Plant, 29th. Engineers, U.S. Army, 1918. https://collections.library.yale.edu/catalog/15237968.

APA, 6th edition

The Situation in the Causcasus and Central Asia : from information received to August 25. (1918). [Maps]. Base Printing Plant, 29th. Engineers, U.S. Army, https://collections.library.yale.edu/catalog/15237968.