McMurry, John
Brooks/Cole, 2007
Buku Teks
Pavlov, B.
Foreign Languange Publishing House, [Date of publication not identified]
Buku Teks SO
Hart, Harold, 1922-
Houghton Miffiln, 1991
Buku Teks
Hart, David J.
Penerbit Erlangga, 2003
Multimedia
Atkins, Robert C. [Robert Charles], 1944-
McGraw-Hill, 1990
Buku Teks SO