Bix, Brian H., author
Cambridge University Press, 2012
Buku Teks
Ateneo de Manila University, 2002
Buku Teks
Ahuja, B. N., author
Surjeet Publications, 1988
Buku Teks
McLaughlin, Eugene, author
Sage, 2013
Buku Teks
von Elverfeldt, Kirsten, author
Springer, 2012
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