Freeborn, Dennis, author
Macmillan, 1993
Buku Teks
Hickey, Raymond, 1954-, author
Wiley Blackwell, 2014
Buku Referensi
Bloomfield, Leonard, author
Amsterdam John Benjamins Publishing 1983
Buku Teks
Barber, Charles
Cambridge University Press, 1993
Buku Teks
Baka, Farida, author
Janus Publishing , 1988
Buku Teks