Dickinson, Leslie
Cambridge University Press , 1988
Buku Teks
Silberman, Melvin L., author
Nusamedia, 2006
Buku Teks
Amin Singgih, author
Erlangga , 1993
Buku Teks
edited by Michael R. Kibby and J. Roger Hartley
Pergamon Press, 1992
Buku Teks
editors, D.H. Norrie, H.W. Six
Springer-Verlag , 1990
Buku Teks