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..
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিAmerican University (Washington, D.C.). Foreign Area Studies, এবং 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.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিAmerican University (Washington, D.C.). Foreign Area Studies, এবং 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.
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