Anderson, Wallace L.
Introductory readings on language
Holt, Rinehart and Winston, 1966
 Buku Teks SO
Readings in linguistics II
edited by Eric P. Hamp, Fred W. Householder, Robert Austerlitz
University of Chicago Press, 1966
 Buku Referensi
Psycholinguistics : a book of readings
edited by Sol Saporta
Holt, Rinehart and Winston, 1961
 Buku Teks SO
Muller, F Max
Wissenschaft der Sprache / F. Max Muller
Verlag von Julius Klinkhardt, 1875
 Buku Teks
Readings in linguistics I : the development of descriptive linguistics in America, 1925-56
edited by Martin Joos
University of Chicago Press, 1966
 Buku Referensi