Day, D M.
Butterworth, 1993
Buku Teks
Goode, Roy, author
Penguin Books, 2004
Buku Teks
Marsh, S.B., author
McGraw-Hill, 1975
Buku Teks
Kharofa, Ala Eddin, author
A.S. Noordeen, 2009
Buku Teks
Adams, Kristen David, author
St. Paul, MN : West Group, 2010
Buku Teks