Allen, Edward David, 1923-
Classroom techniques : foreign languages and English as a second language
Harcourt Brace Jovanovich, c1977
 Buku Teks
Second language acquisition and its pscycho-cultural implications
 Artikel Jurnal
Second language writing : research insights for the classroom / edited, Barbara Kroll
editedby Barbara Kroll
Cambridge University Press, 1990
 Buku Teks
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