Rand McNally war map of the French front : northern section : strategic map of the battle ground in northern France from St. Quentin to St. Mihiel, showing the farthest advance of the Germans in 1914 and the battle line in September, 1917.
MLA
McNally, Rand, and Company. Rand McNally War Map of the French Front : Northern Section : Strategic Map of the Battle Ground in Northern France from St. Quentin to St. Mihiel, Showing the Farthest Advance of the Germans in 1914 and the Battle Line in September, 1917. The Company, 0AD. https://collections.library.yale.edu/catalog/15237937.
APA, 6th edition
McNally, R., & C. (0 C.E.). Rand McNally war map of the French front : northern section : strategic map of the battle ground in northern France from St. Quentin to St. Mihiel, showing the farthest advance of the Germans in 1914 and the battle line in September, 1917. [Maps]. The Company, https://collections.library.yale.edu/catalog/15237937.