[publisher not identified], [date of publication not identified]
Buku Teks
Robson, William Alexander, 1895-1980, author
Stevens & Sons Limited, 1951
Buku Teks
Viano, Emilio C., author
Nelson-Hall, 1975
Buku Teks
Wang, Lv, author
China Renmin University Press, 2015
eBooks
edited Jeffrey Jowell and Dawn Oliver
Clarendon Press, 1989
Buku Teks