Bluttman, Ken <br/><br/>
Excel formulas and functions for dummies / 
Ken Bluttman and Peter G. Aitken 
 - Hoboken, NJ:  Wiley,  2005 
 - xvi, 385 p.:  ill.;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0764575562