Covey, S. R. (1999). Living the 7 habits: Stories of courage and inspiration. Fireside.
Chicagoスタイル(17版)引用形式Covey, Stephen R. Living the 7 Habits: Stories of Courage and Inspiration. New York: Fireside, 1999.
MLA(9版)引用形式Covey, Stephen R. Living the 7 Habits: Stories of Courage and Inspiration. Fireside, 1999.
警告: この引用は必ずしも正確ではありません.