Stephen M. Horan, editor
John Wiley & Sons, 2009
Buku Teks
Crispin Thurlow, Adam Jaworski, editors
Routledge, 2018
Buku Teks
Evans, David T., author
Routledge, 1993
Buku Teks
edited by Ronald Beiner
State University, 1995
Buku Teks
Williamson, J.A.
Macmillan, 1965
Buku Teks