Budworth, Geoffrey, author
Chancellor Press , 1997
Buku Referensi
Bird, Richard M., author
Ward Lock, 1995
Buku Teks
Brennan, Lynne, author
Platkus, 1991
Buku Teks
Becker, Norman, author
McGraw-Hill, 2011
Buku Teks
Augusto Rinaldi
Crescent Books, 1985
Buku Referensi