Covey, S. R. (1990). Principle centered leadership. Simon & Schuster.
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Chicago Style (17th ed.) Citation
Covey, Stephen R. Principle Centered Leadership. London: Simon & Schuster, 1990.
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ציטוט MLA
Covey, Stephen R. Principle Centered Leadership. Simon & Schuster, 1990.
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אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.