Allen, Edward D.
Classroom techniques : foreign languages and English as a second language
Harcourt Brace Jovanovich, [Date of publication not identified]
 Buku Teks
Second language acquisition and its pscycho-cultural implications
 Artikel Jurnal
Second language writing : research insights for the classroom / edited, Barbara Kroll
Cambridge University Press, 1990
 Buku Teks
Kroll, B.
Second Language Writing Research Insights for the Classroom Barbara Kroll
Cambridge University Press, 1990
 Buku Teks
Second Language Research
Norwich : Edward Arnold, The educationl, academic and medical publishing
 Majalah, Jurnal, Buletin