Cook, Nigel P., author
Prentice-Hall, 1993
Buku Teks
Veley, Victor F., author
Glencoe, 1993
Buku Teks
Grob, Bernard, author
McGraw-Hill, 1977
Buku Teks
Mitchell, F. H., author
Addison-Wesley, 1959
Buku Teks
Watson, John, author
Macmillan, 1990
Buku Teks