Cite

The cross and the crescent--Harper's pictorial map of the seat of the war in the east [cartographic material] / Harper & Brothers.

MLA

Harper, and Brothers. The Cross and the Crescent--Harper's Pictorial Map of the Seat of the War in the East [Cartographic Material] / Harper & Brothers. Harper & Bros., 0AD. https://collections.library.yale.edu/catalog/15506456.

APA, 6th edition

H., & B. (0 C.E.). The cross and the crescent--Harper's pictorial map of the seat of the war in the east [cartographic material] / Harper & Brothers. [Pictorial maps]. Harper & Bros., https://collections.library.yale.edu/catalog/15506456.