APA (7th ed.) Citation

American University (Washington, D.C.). Foreign Area Studies, United States. Department of the Army, & Nyrop, R. F. (1986). The Yemens, country studies (2nd ed., 1986.). American University, Foreign Area Studies.

Chicago Style (17th ed.) Citation

American University (Washington, D.C.). Foreign Area Studies, United States. Department of the Army, and Richard F. Nyrop. The Yemens, Country Studies. 2nd ed., 1986. Washington, D.C.: American University, Foreign Area Studies, 1986.

MLA (9th ed.) Citation

American University (Washington, D.C.). Foreign Area Studies, et al. The Yemens, Country Studies. 2nd ed., 1986. American University, Foreign Area Studies, 1986.