edited by Martin Joos
University of Chicago Press, 1966
Buku Referensi
edited by Thomas A. Sebeok
Mouton, 1967
Buku Referensi
Greenberg, Joseph H. (Joseph Harold), 1915-2001
University of Chicago Press, 1957
Buku Teks SO
edited by Archibald A. Hill
Basic Books, 1969
Buku Teks SO
Corder, Stephen Pit
Penguin Books , 1973
Buku Teks SO