Robinson, Philip
Rajawali, 1986
Buku Teks
Mallinson, Vernon
London Heinemann 1960
Buku Teks
Page, G. Terry
New York Kogan Page 1977
Buku Referensi
Page, G. Terry
New York, Kogan Page, 1977
Buku Referensi
Education Research Institute Seoul National University, 2005
Majalah, Jurnal, Buletin