Nation, James L., author
CRC Press, Taylor & Francis Group, 2008
Buku Teks
Saunders, D.S., author
Pergamon Press, 1982
Buku Teks
edited by Bernd Heinrich
John Wiley & Sons, 1981
Buku Teks
Academic Press, 1992
Buku Teks
Moore, Thomas C., author
Springer-Verlag, 1989
Buku Teks