Covey, S. R. (1999). Living the 7 habits: Stories of courage and inspiration. New York: Simon and Schuster.
Trích dẫn kiểu ChicagoCovey, Stephen R. Living the 7 Habits: Stories of Courage and Inspiration. New York: Simon and Schuster, 1999.
MLA citiranjeCovey, Stephen R. Living the 7 Habits: Stories of Courage and Inspiration. New York: Simon and Schuster, 1999.
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