Maxwell, John C.
25 cara untuk membuat orang lain menyukai Anda : dan merasa diri mereka ada dalam kondisi prima = 25 ways to win wi9th people : how to make others feel like a million bucks
Menuju Insan Cemerlang, 2014
 Buku Teks SO
Brinkman, Rick
Dealing with difficult people: 24 lessons for bringing out the best in everyone
McGraw-Hill, 2003
 Buku Teks SO
Marcic, Dorothy
Managing with the wisdom of love: uncovering virtue in people and organizations / Dorothy Marcis
Jossey-Bass, 1997
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Wiskup, Mark
The "it" factor: be the one people like, listen to and remember
American Management Association, 2007
 eBooks
Bernstein, Albert J
Emotional vampires: dealing wuth people who drain you dry
McGraw-Hill, 2001
 Buku Teks SO