Hughes, Rebecca
Routledge, 1996
Buku Teks
Hultquist, Paul F.
The Benjamin Cumming Pub., 1988
Buku Teks
Mikhailov, Mikhail, author
Routledge, 2017
Buku Teks
Tony McEnery, Andrew Wilson, editor
Edinburgh University Press , 2001
Buku Teks
Jepson, R. W.
Longman , 1936
Buku Teks