Trask, R.L.
Routledge, 1999
Buku Teks
Trask, R.L., author
London, 1998
Buku Referensi
edited by Siobhan Chapman
Oxford University Press, 2005
Buku Teks
Edinburgh, Edinburgh University Press, 2005
Buku Referensi
Vernon, Mark, author
RajaGrafindo Persada, 2011
Buku Teks