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Buku Teks
Menchik, Jeremy, author
Cambridge University Press, 2016
eBooks
A.A. Bagus Pratama Putra, author
2015
UI - Skripsi (Membership)
Andrews, William G.
D.van Nostrand Company,Inc., 1968
Buku Teks
Petra Dobner, Martin Loughlin, editors
Oxford University Press, 2012
Buku Teks