Podolinsky, Michael A, author
McGraw-Hill, 2011
Buku Teks
Kumar, Jagdish, author
S.S. Mubarak and Brothers, 1996
Buku Teks
Goh Chok Tong, author
Ministry of Information, Communications and the Arts, 2004
Buku Teks
Englert, Robert D., author
McGraw-Hill, 1990
Buku Teks
Attenborough, David
BBC Worldwide Limited, 2004
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