Bessant, John
Gower , 1985
Buku Teks
Hartmann, Heinz
Pricenton University Press, 1959
Buku Teks
Yao-Sheng Chien
Institute of Advanced Projects , 1962
Buku Teks
S. E Stephanou
Daniel Spencer Pubs, 1980
Buku Teks
Child, John, author
George Allen and Unwin, 1969
Buku Teks