Bui, Yvonne N., author
Sage , 2014
Buku Teks
Evans, David, author
Melbourne University Press, 2002
Buku Teks
Iacone, Salvatore J., author
Carrer Press, 2003
Buku Teks
Dean, John J.
Boolarong Publications, 1987
Buku Teks
Shay, Susan T., author
Kiplinger Books, 2001
Buku Teks