توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

American University (Washington, D.C.). Foreign Area Studies, & Nyrop, R. F. (1986). The Yemens: Country studies (2nd ed.). American University, Foreign Area Studies : For sale by the Supt. of Docs., U.S. G.P.O..

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

American University (Washington, D.C.). Foreign Area Studies, و Richard F. Nyrop. The Yemens: Country Studies. 2nd ed. Washington, D.C.: American University, Foreign Area Studies : For sale by the Supt. of Docs., U.S. G.P.O., 1986.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

American University (Washington, D.C.). Foreign Area Studies, و Richard F. Nyrop. The Yemens: Country Studies. 2nd ed. American University, Foreign Area Studies : For sale by the Supt. of Docs., U.S. G.P.O., 1986.