Carsberg, B.V.
Prentice Hall International, 1984
Buku Teks
Helena
1989
UI - Skripsi (Membership)
Carter, William K., 1951-
Dame/Thomson Learning, 2002
Buku Teks
Hammer, Lawrence H.
South-Western, 1993
Buku Teks
Moriarity, Shane
John Wiley & Sons, 1991
Buku Teks