Beck, Charles E., author
Prentice-Hall, 1999
Buku Teks
Locker, Kitty O., author
McGraw-Hill, 2013
Buku Teks
Locker, Kitty O., author
Irwin, 1995
Buku Referensi
Locker, Kitty O.
McGraw-Hill, 2000
Multimedia
Ewald, Helen Rothschild
Prentice Hall International, 1997
Buku Teks