Engel, Baverly
Honor your anger: how transforming your anger style can change your life
John Wiley & Sons, 2004
 Buku Teks SO
Weiss, Marisa C.
Living beyong breast cancer: a survivors guide for when treatment ends and the rest of your life begins
Times Books , 1998
 Buku Teks SO
Kemp, Jana
No!: how one simple word can transform your life
American Management Association, 2005
 eBooks
Tracy, Brian
Change your thinking change your life : how to unlock your full potential for success and achievement
John Wiley & Sons, 2003
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Agness, Lindsey
Change your life with NLP: cara mengubah hidup anda lebih dahsyat
Ufuk Press, 2012
 Buku Teks SO