Cambridge University Press, 2001
eBooks
Tagliamonte, Sali, author
West Sussex John Wiley & Sons, 2016
Buku Teks
Raymond Hickey, editor
Wiley-Blackwell, 2010
Buku Teks
Thomason, Sarah Grey
Los Angeles University of California Press, 1991
Buku Teks
Cambridge University Press, 2007
eBooks