Clark, Kenneth W.
Prentice-Hall, 1971
Buku Teks
Regina Jansen, author
1986
UI - Skripsi (Membership)
J. Soedradjad Djiwandono, author
UI-Press, 1994
UI - Pidato
Dernburg, Thomas F.
Bharata , 1972
Buku Teks
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2004
UI - Skripsi (Membership)