Language
 Buku Teks
Bloom, Lois
Language development and language disordes
New York John Wiley & Sons 1978
 Buku Teks
Cook, Guy W.D.
Language play, language learning
Oxford University Press, 2000
 Buku Teks
Language and Language Behavior Abstract's
San Diego : Sosiological Abstracts Inc.
 Majalah, Jurnal, Buletin
Language and language learning
edited by Albert H. Marckwardt
National Council of Teachers of English, 1968
 Buku Teks SO