Hill, Napoleon, author
Secrets of Napoleon Hill's mind
Ufuk Press, 2009
 Buku Teks
Covey, Stephen R., author
Renungan harian manusia yang sangat efektif : hidupkan 7 kebiasaan manusia yang sangat efektif dalam kehidupan sehari-hari
Interaksara, 2000
 Buku Teks
Rose, Anthony A., author
Daddy's logic: live alife of no limits, no excuses, no regrets
McGraw-Hill, 2013
 Buku Teks
Kaplan, Burton, author
Everything you need to know to talk your way to success
Prentice-Hall, 1995
 Buku Teks
Kaplan, Burton, author
Winning people over : 14 days to power and confidence
Prentice-Hall, 1996
 Buku Teks
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