Sejarah khalifah rasulullah - Zulkifli Mohd Yusoff; Ulin Nuha Muhammad (Batu Caves, Selangor: PTS Islamika, 2009)
No. tag : 0900537 - 0900539, 1301049
Includes bibliographical recerences
Keywords: Abu Bakar -- Caliph, 634; Umar ibn al-khattab -- Caliph, 644; Uithman ibn Affan -- Caliph, 656; Ali ibn Abi Talib -- Caliph, 600 (ca.) - 661; Muhammad, prophet, 632 -- Companions; Islamic Empire -- History -- 622 - 661