Trudgill, Peter, author
Penguin, 1995
Buku Teks
edited by Dell Hymes
Harper & Row, 1966
Buku Teks
Searle, John R., author
A Member of the Perseus Books Group, 1998
Buku Teks
Peach, Richard K., author
Esevier, 2012
Buku Teks
Singapore University Press, 1980
Buku Teks