Demers, Richard A.
MIT Press, 1991
Buku Teks
Gleason, Henry Allan
Holt, Rinehard, 1963
Buku Teks
edited by Anne E. Baker and Kees Hengeveld
Wiley-Blackweell, 2012
Buku Teks
edited by Archibald A. Hill
Voice of America, 1969
Buku Teks
Saussure, Ferdinand de, 1857-1913, author
Open Court , 1986
Buku Teks