Dyer, Gillian
Routledge, 1996
Buku Teks
Lwin, May, author
Bhuana Ilmu Populer, 2005
Buku Teks
Shelly Rodgers and Esther Thorson
Routledge, 2012
Buku Teks
Arens, William F., author
Irwin /McGraw-Hill, 1999
Buku Teks
Lane, W. Ronald, author
Prentice-Hall, 2001
Buku Teks