Introduction to ABAP programming  for SAP / 
Gareth de Bruyn; Robert Lyfareff; Mark Balleza; Dhruv Kashyap 
 - 3rd ed. 
 - USA :  Cengage Learning PTR,  2015. 
 - xvi, 520 p.: ill.; 23.1 cm. 
<br/><br/>Includes appendices, index 
<br/><br/><label>ISBN: </label>9781305266476 
<br/><br/><label>Dewey Class. No.: </label>C 650.028 D354 2015