Adrian, James J., author
Reston Publishing, 1979
Buku Teks
Syed Alwi Mohamed Sultan, author
Cert , 2006
Buku Teks
Black, Geoff
London : Prentice Hall, 2001,
Buku Referensi
Wild, John J., author
Irwin/McGraw-Hill, 2000
Buku Teks
Black, Geoff, author
Prentice-Hall, 2002
Buku Referensi