David J. Whittaker
Routledge, 2001
Buku Teks
Artikel Jurnal
edited by Christopher C. Harmon, Andrew N. Pratt, Sebastian Gorka
McGraw-Hill, 2011
Buku Teks
M. Ridho Ficardo, author
Program Pascasarjana Universitas Indonesia, 2006
UI - Tesis (Membership)
Forst, Brian, author
Cambridge University Press, 2009
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