Edited by William James
Anmol Publications PVT. LTD., 2005
Buku Teks
Otterspeer, Willem, author
Leiden University Press, 2008
Buku Teks
University of Southern California, 2014
Buku Referensi
Fort Church Publishers, Inc., 1985
Buku Teks
Barnes, Gregory A.
National textbook Co., 1993
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