Zenger, John H.
The Handbook for leaders: 24 lessons for extraordinary leadership
McGraw-Hill, 2003
 Buku Teks SO
Zenger, John H.
The handbook for leaders: 24 lessons for extraordinary leadership
McGraw-Hill, 2004
 Buku Referensi
Managers as leaders
Harvard Bussiness School Press, 1990
 Buku Teks SO
Hughes, Richard L.
Leadership : enhancing the lessons of experince
Irwin/McGraw-Hill, 1999
 Buku Teks SO
Hughes, Richard L.
Leadership : enhancing the lessons of experience
McGraw-Hill, 2006
 Buku Teks SO