Alloway, Tom. <br/><br/>
Sniffy :  The Virtual Rat : Pro Version 2.0 / 
Tom Alloway, Greg Wilson, Jeff Graham. 
 - Belmont, CA :  Wadsworth,Cengage Learning  c2005. 
 - xxv, 260 p. ;  24 cm. +  1 CD-ROM (4 3/4 in.)