Dickinson, Markus
Wiley-Blackwell, 2013
Buku Teks
Masterman, Margaret
Cambridge University Press, 2005
eBooks
edited by Alexander Clark, Chris Fox and Shalom Lappin
Wiley-Blackwell, 2013
Buku Teks
Branco, António
Springer, 2012
eBooks
Smedt, Koenraad De
Springer, 2012
eBooks