Robinson, E. A. G., author
James Nisbet and Co.Ltd., 1958
Buku Teks
Bendell, Tony, author
Elex Media Komputindo, 2000
Buku Teks
Bendell, Tony, author
Elex Media Komputindo, 2000
Buku Teks
Duke University Press, 1987
Buku Teks
Amos David
John Wiley, 2011
Buku Teks