Derlega, Valerian J.
Personal adjustment: the psychology of everyday life
Scott Foresman , 1981
 Buku Teks
Covey, Sean
The 7 habits of highly effective teens : personal workbook
A Fireside Book, 2004
 Buku Teks
Covey, Sean
The 7 habits of highly effective teens : personal workbook
[publisher not identified], [date of publication no identified]
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DuBrin, Andrew J.
Human relations for career and personal success
Reston Publishing Company, 1983
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Covey, Stephen R.
The sevevn habits of highly effective people : powerfull lessons in personal change
Simon & Schuster , 1990
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