American University (Washington, D.C.). Foreign Area Studies, & Nyrop, R. F. (1977). Area handbook for the Yemens. For sale by the Supt. of Docs., U.S. Govt. Print. Off..
Chicagoスタイル(17版)引用形式American University (Washington, D.C.). Foreign Area Studies, , Richard F. Nyrop. Area Handbook for the Yemens. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.
MLA(8版)引用形式American University (Washington, D.C.). Foreign Area Studies, , Richard F. Nyrop. Area Handbook for the Yemens. For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.
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