Antoniou, Andreas
McGraw-Hill, , 1993
Buku Teks
Antoniou, Andreas
Tata McGraw-Hill, 1979"
Buku Teks
Parks, T.W.
Wiley, 1987
Buku Teks
Harahap, Rusdi L.
Universitas Indonesia, 1995
UI - Skripsi (Membership)
Phillips, Charles L.
Prentice Hall International, Inc., 1997
Buku Teks