Chaika, Elaine, author
Whurr Publishers, 2000
Buku Teks
Coulthard, Malcolm, author
Routledge, 2017
Buku Teks
McEnery, Tony, 1964-, author
Cambridge University Press, 2012
Buku Teks
William Bright, editor-in-chief
Oxford University Press, 1992
Buku Referensi
William Bright, editor-in-chief
Oxford University Press, 1992
Buku Referensi