Covey Stephen R. (2004). Seven habits Of Highly Effective People. Simon Schuster.
Chicago-čujuhus (17. p.)Covey Stephen R. Seven Habits Of Highly Effective People. London: Simon Schuster, 2004.
MLA-čujuhus (9. p.)Covey Stephen R. Seven Habits Of Highly Effective People. Simon Schuster, 2004.
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