Aboo Bakr, radhiyallahu anhu /
Patel, Muhammad Aslam.
Sharāfat Hasin,Ḥakīm.
Nadwee, Mueenuddeen Ahmad.Mueenuddeen Ahmad,Shāh.
Dewsbury : Ashraf's Amānat,
2000.
Previous ed.: 1998.
Abū Bakr al-Ṣiddīq, Orthodox Caliph of Islam, -634.
Caliphs