A. Abbas Salim, author
Rajawali, 1989
Buku Teks
A. Abbas Salim, author
RajaGrafindo Persada, 1991
Buku Teks
Williams, Numan A., author
South-Western Publicashing, 1984
Buku Teks
Cornwall, Martin, author
Collier Books , 1963
Buku Teks
Henrico Alexander, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1994
UI - Skripsi (Membership)