Koestenbaum, Peter
Leadership
Jossey-Bass, 1991
 Buku Teks
Haynes, W. Warren [William Warren], 1921-1972
MANAGEMENT
PRENTOCE-HALL, Inc, Englewood Clifts, 1969
 Buku Teks
Fitagerald, Hiram E
Developmental psychology
0, 1982
 Buku Teks
Five years that shook the world
Westview Press, 1991
 Buku Teks
Orilia, Lawrence
Introduction to business data processing
McGraw-Hill, 1983
 Buku Teks SO