Ristad, Eric Sven
MIT Press , 1993
Buku Teks
Dickinson, Markus, author
Wiley-Blackwell, 2013
Buku Teks
Masterman, Margaret, author
Cambridge University Press, 2005
eBooks
edited by Alexander Clark, Chris Fox and Shalom Lappin
Wiley-Blackwell, 2013
Buku Teks
Borin, Lars, author
Springer, 2012
eBooks