edited by Herbert W. Robinson; Douglas E. Knight
Spartan Books , 1972
Buku Teks
Wiener, Norbert, author
Eyre and Spottiswoode, 1950
Buku Teks
Ashby, W. Ross, author
Chapman and Hall , 1973
Buku Teks
Beer, Stafford
English University Press, 1973
Buku Teks
George, F.H.
Pan Books, 1970
Buku Teks