Ananiadou, Sophia, author
Springer, 2012
eBooks
Greenbaum, Sidney
Longman , 1990
Buku Teks
Ron White...[et al.]
Cambridge University Press , 1991
Buku Teks
Crystal, David, 1941-, author
Cambridge University Press, 1995
Buku Referensi
Longman, 1984
Buku Referensi