edited by Gary Edson
Routledge , 1997
Buku Teks
Lockridge, Laurence S., author
Cambridge University Press, 1989
Buku Teks
Ian E. Thompson [and others]
Elsevier, 2006
Buku Teks
Thompson, Ian E., author
Churcill Livingstone, 1988
Buku Teks
Kagan, Shelly, author
Westview Press, 1997
Buku Teks