edited by Sol Saporta
Holt, Rinehart and Winston, 1961
Buku Teks
edited by Eric P. Hamp, Fred W. Householder, Robert Austerlitz
University of Chicago Press, 1966
Buku Referensi
Muller, F Max
Verlag von Julius Klinkhardt, 1875
Buku Teks
edited by Martin Joos
University of Chicago Press, 1966
Buku Referensi
The Australian National University, 1964
Buku Teks SO