Cowles Education Corporation. (1968). Cowles encyclopedia of nations. Cowles Education Corp.
シカゴスタイル引用形Cowles Education Corporation. Cowles Encyclopedia of Nations. [New York]: Cowles Education Corp, 1968.
MLA引用形式Cowles Education Corporation. Cowles Encyclopedia of Nations. Cowles Education Corp, 1968.
警告: この引用は必ずしも正確ではありません.