Reekie, Gail
NSW, Australia Allen & Unwin , 1993
Buku Teks
Cambridge University Press, 2020
eBooks
Halomoan, Ricardo, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2006
UI - Tesis Membership
Bly, Robert W., author
American Management Association, 2006
eBooks
Maclean, Robert, author
Angus and Robertson, 1975
Buku Teks