Berry, Aidan
Chapman and Hall, 1991
Buku Teks
Ward, Aidan, author
John Wiley & Sons Ltd, 2003
Buku Teks
Malloy, Robin Paul
Cambridge University Press, 2004
Buku Teks
Craig, Robin Kundis
Thomson/West, 2008
Buku Teks
Soriane, Emmanuel V., author
Sintag-Tala, 1987
Buku Teks