The real ACT prep guide :  The only official prep guide from the makers of the ACT /. 

 - 3rd edition 
 - Iowa City, Iowa :  AST  Peterson's,  2011. 
 - 929 p. :  ill. + 1 CD-ROM (4 3/4 in.) ;  28 cm. 
<br/><br/><label>ISBN: </label>978-0-7689-3440-3 0-7689-3440-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics