Wu, li, author
China Intercontinental Press, 2010
Buku Teks
Reagan, Michael D., author
Oxford University Press, 1963
Buku Teks
Equinox, 2007
Buku Teks
Warde, Ibrahim, author
Edinburgh University Press, 2000
Buku Teks
Thee, Kian Wie, author
ISEAS Publishing, 2012
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