DiMuzio, Tim, author
Routledge, 2017
Buku Teks
Puckett, Kent, author
Cambridge University Press, 2016
Buku Teks
Robbins, Paul, author
Wiley-Blackwell, 2014
Buku Teks
Thomson, Anne, author
Routledge , 1996
Buku Teks
Shaw, Valerie, author
Longman, Green, 1994
Buku Teks