Halliday, Fred
Cambridge University Press, 2005
Buku Teks
Milton-Edwards, Beverly
Routledge, 2003
Buku Teks
Ziegler, David M.
Little, Brown, 1981
Buku Teks
Rourke, John T.
McGraw-Hill, 2007
Buku Teks
edited by Frederick H. Hartman
McGraw-Hill, 1951
Buku Teks