Mather, P.M., author
John Wiley & Sons, 1976
Buku Teks
Shaik, Sason S., 1943-, author
Wiley, 1992
Buku Teks
Tarbuck, Edward J., author
Maxwell Macmillan, 1993
Buku Teks
McGeary, David, author
McGraw-Hill, 2004
Buku Referensi
Carlson, Diane H., author
McGraw-Hill , 2008
Buku Teks