COVEY, S. R. (1997). The seven habits of highly effective people. Jakarta: Binarupa Aksara.
シカゴスタイル引用形COVEY, Stephen R. The Seven Habits of Highly Effective People. Jakarta: Binarupa Aksara, 1997.
MLA引用形式COVEY, Stephen R. The Seven Habits of Highly Effective People. Jakarta: Binarupa Aksara, 1997.
警告: この引用は必ずしも正確ではありません.