Laird, Charlton Grant, 1901-
The miracle of language / by Charlton Laird
Fawcett World Library, 1957
 Buku Teks
Pinker, Steven
The language instict : the new science of language and mind / Steven Pinker
Penguin books, 1994
 Buku Teks
Whatmough, Joshua
Language: a modern synthesis / Joshua Whatmough
The New American Library, 1956
 Buku Teks
Jespersen, Otto, author
Language its nature, development and origin
George Allen and Unwin, 1950
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Universals of language / edited by Joseph H. Greenberg
The M.I.T. Press, 1966
 Buku Teks