Fakultas Ekonomi dan Bisnis Universitas Indonesia, -
UI - Skripsi (Membership)
Yu, Yan, author
Intercontinental Press, 2008
Buku Teks
Ahearn, Daniel S., author
Columbia University Press, 1963
Buku Teks
Burgess, W. Randolph
Harper & Brothers , 1946
Buku Teks
Gupta, G.P.
Publishing House , 1959
Buku Teks