Hayen, Roger, <br/><br/>
SAP R/3 Enterprise Software: An Introduction : 

 -  McGraw-Hill/Irwin,  2006. 
<br/><br/><label>ISBN: </label>9780072990676 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business & Economics.
<br/><br/><label>Dewey Class. No.: </label>650.028553769  / HAY