Readings in linguistics II
edited by Eric P. Hamp, Fred W. Householder, Robert Austerlitz
University of Chicago Press, 1966
 Buku Referensi
Current trends in linguistics : volume X parts 1, linguistics in North America
edited by Thomas A. Sebeok
Mouton, 1973
 Buku Referensi
Current trends in linguistics : volume X parts 2, linguistics in North America
edited by Thomas A. Sebeok
Mouton, 1973
 Buku Referensi
Greenberg, Joseph H. (Joseph Harold), 1915-2001
Essays in linguistics
University of Chicago Press, 1957
 Buku Teks SO
Linguistics today
edited by Archibald A. Hill
Basic Books, 1969
 Buku Teks SO