Ahearn, Laura M. author
John Wiley & Sons, Incorporated,, 2016
Buku Teks
Ladefoged, Peter, author
Blackwell publisher, 2001
Buku Teks
Ottenheimer, Harriet Joseph, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Cambridge University Press, 2009
eBooks
Zsiga, Elizabeth C., author
West Sussex Wiley-Blackwell, 2013
Buku Teks