Saburo, O. (1993). Steps to the 21st century. Tokyo: The Japan Times.
シカゴスタイル引用形Saburo, Okita. Steps to the 21st Century. Tokyo: The Japan Times, 1993.
MLA引用形式Saburo, Okita. Steps to the 21st Century. Tokyo: The Japan Times, 1993.
警告: この引用は必ずしも正確ではありません.