Luksetich, William A., author
Little, Brown, 1982
Buku Teks
edited by Jaume Puig-Junoy
Edward Elgar, 2005
Buku Teks
Forst, Brian, author
Cambridge University Press, 2009
eBooks
Palmer, Axel, author
Routledge, 2018
Buku Teks
Weiler, E. T.
Macmillan, 1958
Buku Teks