Tennick, Art <br/><br/>
Practical powerpivot & DAX formulas for excel 2010 / 
Art Tennick 
 - New York :  McGraw-Hill Osborne Media,  2011 
 - xxvi, 438 p. :  ill. ;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780071746854 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Microsoft Excel (Computer file)
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business intelligence--Computer programs<br/>Business--Computer programs