Covey, S. (1997). The 7 habits of highly effective families. Simon & Schuster.
Chicagoスタイル(17版)引用形式Covey, Stephen. The 7 Habits of Highly Effective Families. New York: Simon & Schuster, 1997.
MLA(9版)引用形式Covey, Stephen. The 7 Habits of Highly Effective Families. Simon & Schuster, 1997.
警告: この引用は必ずしも正確ではありません.