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