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Wiley, 1990
Buku Teks
Wright, Paul H.
John Wiley & Sons, 1979
Buku Teks
Singh, Gurcharn
Standard Publishers Distributors, 1978
Buku Teks
Oglesby, Clarkson H. (Clarkson Hill), 1908-
John Wiley & Sons, 1982
Buku Teks
Wright, Paul H.
John Wiley & Sons, 2004
Buku Teks