Trask, R.L., author
Routledge, 1996
Buku Referensi
Johnson, Keith, author
Blackwell Publishers, 2012
Buku Teks
Ogden, Richard, author
Edinburgh University Press, 2017
Buku Teks
Ball, Martin J., author
Lawrence Erlbaum Associates, 2005
Buku Teks
Clark, John, author
Blackwell, 1995
Buku Teks