Leung, Albert Y., author
Wiley, 1996
Buku Referensi
Leung, Albert Y., author
John Wiley & Sons, 1996
Buku Referensi
Sambidge, Gordon, author
Piccadilly Press Ltd., 1992
Buku Referensi
Murray, Michael, author
A Division of Prima Publishing, 1998
Buku Teks
Smyth, Angela, author
Thorsons, 1994
Buku Referensi