Basic Books, 1969
Buku Teks
edited by Eric P. Hamp, Fred W. Householder, Robert Austerlitz
University of Chicago Press, 1966
Buku Referensi
Harris, Zellig S.
D. Reidel , 1970
Buku Teks
Corder, Stephen Pit, editor
Penguin Books , 1973
Buku Teks
edited by Thomas A. Sebeok
Mouton, 1973
Buku Referensi