Routledge, 2015
Buku Teks
Artikel Jurnal
Daly, John L., 1952-, author
M.E. Sharpe, 2012
Buku Teks
Roller, Edeltraud, author
Oxford University Press, 2008
Buku Teks
edited by Michael H. Merson, Robert E. Black and Anne J. Mills
Aspen Publication, 2001
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