Nemeth, Evi, author
Prentice-Hall, 1989
Buku Referensi
Bach, Maurice J., author
Prentice-Hall, 1986
Buku Teks
Ross, John, author
Dinastindo, [Date of publication not identified]
Buku Teks
Glass, Graham, author
Prentice-Hall, 1999
Buku Teks
Foxley, Eric, author
Addison-Wesley, 1985
Buku Teks