APA(7版)引用形式
Covey, S. Tearing down walls: Covey leadership 5. Covey Leadership library.
Chicagoスタイル(17版)引用形式
Covey, Stephen. Tearing Down Walls: Covey Leadership 5. Covey Leadership library.
MLA(9版)引用形式
Covey, Stephen. Tearing Down Walls: Covey Leadership 5. Covey Leadership library.
警告: この引用は必ずしも正確ではありません.