Jack Rizali, author
The Jack Rizali Foundation, 2004
Buku Teks
Powell, Colin L., author
Angkasa, 2001
Buku Teks
Kefala, Antigone, author
Wild & Woolley, 1975
Buku Teks
Bonic, Robert A.
"Lexington, Massachusetts D C Heath and Co., 1971",
Buku Teks
Winston, Robert
BBC Worldwide Limited, 2004
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