al-Mawqif min al-shubuhat'ala khalifah Rasul Allah Abi Bakr al-Siddiq - al-Khalifah, Hamid Muhammad ('Amman : Dar'Ammar, 2010)
Keywords: Abu Bakr, -- Caliph, -- d. 634; Muhammad, -- Prophet, -- d. 632 -- Companions -- Biography