Indonesian Linguistics Society, 2012
Majalah, Jurnal, Buletin
Corder, Stephen Pit
Penguin Books , 1973
Buku Teks
Hunston, Susan
Cambridge University Press,, 2006
Buku Teks SO
Ellis, Sue
Cambridge University Press, 2011
eBooks
Gass, Susan M.
Routledge, 2017
Buku Teks