Field, John, author
Routledge, 2005
Buku Teks
Steinberg, Danny D., author
Longman, 1982
Buku Teks
Psychology Press, 2000
Buku Teks
edited by Michael Tomasello
Lawrence Erlbaum Associates, 2003
Buku Teks
Chomsky, Noam, author
Cambridge University Press, 2006
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