APA (7th ed.) Citation

ProQuest (Firm), Lackner, H., & Varisco, D. M. (2018). Yemen and the Gulf States: The making of a crisis. Gerlach Press.

Chicago Style (17th ed.) Citation

ProQuest (Firm), Helen Lackner, and Daniel Martin Varisco. Yemen and the Gulf States: The Making of a Crisis. Berlin, Germany: Gerlach Press, 2018.

MLA (9th ed.) Citation

ProQuest (Firm), et al. Yemen and the Gulf States: The Making of a Crisis. Gerlach Press, 2018.