Mcnamee, Patrick
Heinemann , 1988
Buku Teks
Nelson, A. Tom
California Goodyear Pub., 1981
Buku Teks
Andriani Darmono A. Murdoko, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1982
UI - Skripsi (Membership)
Smith, Jack L., author
McGraw-Hill, 1988
Buku Teks
Maharani Hadisoeryo, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1982
UI - Skripsi (Membership)