Blank, Warren
The 108 skills of natural born leaders
[American Management Association, ], 2001
Guide for team leaders in technical assistance projects
D.C. TAM , 1973
 Buku Teks
Aubrey, Bob, 1921-2014
Creating aspirational leaders : the global workforce advantage
McGraw-Hill, 2012
 Buku Teks
Zenger, John H.
The handbook for leaders: 24 lessons for extraordinary leadership
McGraw-Hill, 2004
 Buku Referensi
Mackoff, Barbara
The inner work of leaders : leadership as a habit of mind
American Management Association, 2001
 Buku Teks