COVEY STEPHEN R. (1995). PRINCIPLE CENTRED LEADERSHIP. SIMON & SCHUSTER INC.
芝加哥风格引文COVEY STEPHEN R. PRINCIPLE CENTRED LEADERSHIP. LONDON: SIMON & SCHUSTER INC, 1995.
MLA引文COVEY STEPHEN R. PRINCIPLE CENTRED LEADERSHIP. SIMON & SCHUSTER INC, 1995.
警告：这些引文格式不一定是100％准确.