APA (7th ed.) Citation

Spuler, B., & Wheeler, G. (1971). The Mongols in history. Pall Mall Press.

Chicago Style (17th ed.) Citation

Spuler, Bertold, and Geoffrey Wheeler. The Mongols in History. London: Pall Mall Press, 1971.

MLA (9th ed.) Citation

Spuler, Bertold, and Geoffrey Wheeler. The Mongols in History. Pall Mall Press, 1971.