Não informado. (1953). Northeast Africa series. American University Field Staff.
Chicagoスタイル(17版)引用形式Não informado. Northeast Africa Series. New York: American University Field Staff, 1953.
MLA(8版)引用形式Não informado. Northeast Africa Series. American University Field Staff, 1953.
警告: この引用は必ずしも正確ではありません.