Language
 Buku Teks SO
Bloomfield, Leonard
Language
Holt, Rinehart and Winston, 1961
 Buku Teks SO
Bloom, Lois
Language development and language disordes
New York John Wiley & Sons 1978
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Cook, Guy W.D.
Language play, language learning
Oxford University Press, 2000
 Buku Teks
Language and language learning
edited by Albert H. Marckwardt
National Council of Teachers of English, 1968
 Buku Teks SO