Crystal, David, 1941-
Cambridge University Press, 2004
Buku Teks SO
Cambridge University Press, 2004
eBooks
Dalby, Andrew
A. Lane, 2002
Buku Teks
Austin, Peter K., editor
Cambridge University Press, 2011
eBooks
Christopher Alexander, Sara Ishikawa, Murray Silverstein, Max Jacobson, Ingrid Fiksdahl-King, Sholomo Angel
Oxford University Press, 1977
Buku Referensi