Abdul Aziz, Moulvi <br/><br/>
History of Islam, The Age of the Rightly Guided Caliphs Umar ibn al-Khattab 

 - First 
 - Riyadh  Maktaba Dar-us-Salam  2012 
<br/><br/><label>ISBN: </label>978-603-500-077-2 
<br/><br/><label>Dewey Class. No.: </label>297