Chung-Ying Cheng, Eric Nelson, and Linyu Gu.
John Wiley , 2013
Buku Teks
Blackwell Publishing, 2007
Buku Teks
edited by Noel Entwistle
Routledge, 1990
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Saiyidain, K.G.
Shaikh Muhammad Ashraf, 1954
Buku Teks
Wit, Han F. de
Duquesne University Press, 1991
Buku Teks SO