Lehmann, Winfred P., author
Holt, Rinehart & Winston, 1973
Buku Teks
Trask, R.L.
Routledge, 1999
Buku Teks
Li Wei
John Wiley & Sons Ltd, 2014
Buku Teks
edited by Kirsten Malmkjær, James M. Anderson
Routledge, 1991
Buku Referensi
Harris, Zellig S., author
Chicago Phoenix Books, 1969
Buku Teks