International Telecommunication Union. (1974). What is ITU? Geneva: International Telecommunication Union.
シカゴスタイル引用形International Telecommunication Union. What Is ITU? Geneva: International Telecommunication Union, 1974.
MLA引用形式International Telecommunication Union. What Is ITU? Geneva: International Telecommunication Union, 1974.
警告: この引用は必ずしも正確ではありません.