Langen, Eugen
A.W.Sijthoff, 1973
Buku Teks
Langen, Eugen.
A. W. Sijthoff , 1973
Buku Teks
Jessup, Philip C. (Philip Caryl), 1897-1986, author
Yale University Press, 1956
Buku Teks
Goode, Roy, author
Penguin Books, 2004
Buku Teks
Savage, Nigel
Butterworth, 1991
Buku Teks