Laird, Charlton Grant, 1901-
The miracle of language / by Charlton Laird
Fawcett World Library, 1957
 Buku Teks
Bloomfield, Leonard
Language
Holt, Rinehart and Winston, 1961
 Buku Teks
Beard, Adrian
Language change
Routledge, 2004
 Buku Teks
Klein, Wolfgang
Time in language
Routledge , 1997
 Buku Teks
Universals of language
edited by Joseph H. Greenberg
MIT Press, 1966
 Buku Teks