Osaka University
Osaka University, 2020
Buku Teks
New York : The American Council on the Teaching of Foreign Language Inc
Majalah, Jurnal, Buletin
edited by J. Charles Alderson and A.H. Urquhart
Longman, 1992
Buku Teks
Christie, Francis
Oxford University Press, 1989
Buku Teks
SEAMEO Regional Language Centre, 1983
Buku Referensi