Collie, Joanne
Literature in the language classroom: a resource book of ideas and activities
Cambridge University Press, 1990
 Buku Teks SO
Singh, Jagjit
Great ideas in information theory, language and cybernetics
Dover, 1966
 Buku Teks SO
Collie, Joanne
Literature in the language classroom: a resource book of ideas and activities
Cambridge University Press, 1987
 Buku Teks SO
Munroe, M. Evans
Ideas in mathematics
Addison-Wesley, 1968
 Buku Teks SO
Munroe, M. Evans
Ideas in mathematics
Addison-Wesley, 1968
 Buku Teks SO