Dean, Meryll
Cavendish Publishing Limited, 2002
Buku Teks SO
Foster, Nigel G.
Blakcstone Press, 1993
Buku Teks SO
Mermin, Samuel
Little, Brown, 1973
Buku Teks
Mermin, Samuel
Little, Brown, 1982
Buku Teks
Twomey, David P.
Thomson Learning, 2002
Buku Teks