Anderson, John
Language form and linguistic variation papers dedicated to <=Mac>Intosh>
Amsterdam John Benjamins B.V. 1982
 Buku Teks
Language and Language Behavior Abstract's
San Diego : Sosiological Abstracts Inc.
 Majalah, Jurnal, Buletin
The Journal of the college of foreign languages himeji dokkyo university
Japan : College of foreign languages Himeji Dokkyo University, 2006,
 Majalah, Jurnal, Buletin
Chang Jing Yu
Hanyu Cihui Yu Wanghua Chang Jing Yu Penanggung Jawab Edisi Hu Shuang Bao
Beijing Beijing Daxua Chubanshe, 2000
 Buku Teks
IRAL: International Review of Applied Linguistics in Language Teaching
Julius Groos Verlag, {s.a}
 Majalah, Jurnal, Buletin