Cambridge University Press, 2001
eBooks
Antonius C.G.M. Robben, Jeffrey A. Sluka.
Wiley-Blackwell, 2012
Buku Teks
Schilling, Natalie
Cambridge University Press, 2013
Buku Teks
Phillips, Richard, 1965-
Sage, 2012
Buku Teks
Redfield, Robert
Westview Press, 1991
Buku Teks