Priest, Graham, author
Cambridge University Press, 2008
eBooks
Arya, Atam Parkash, author
McGraw-Hill, 1990
Buku Teks
Sonntag, Richard E., author
John Wiley & Sons, 1991
Buku Teks
Roberts, J.A. Fraser
Oxford University Press, 1985
Buku Teks
Roberts, Margaret
Hutchinson & Co, 1974
Buku Teks