Georgetown University Press, 1972
Buku Teks SO
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, editor
Penguin Books , 1973
Buku Teks
edited by Eric P. Hamp, Fred W. Householder, Robert Austerlitz
University of Chicago Press, 1966
Buku Referensi