Zulkifli Mohd. Yusoff & Ulin Nuha Muhammad. (2009). Sejarah Khalifah Rasulullah. PTS Islamika.
Chicago Style (17th ed.) CitationZulkifli Mohd. Yusoff and Ulin Nuha Muhammad. Sejarah Khalifah Rasulullah. Selangor: PTS Islamika, 2009.
MLA (8th ed.) CitationZulkifli Mohd. Yusoff and Ulin Nuha Muhammad. Sejarah Khalifah Rasulullah. PTS Islamika, 2009.
Warning: These citations may not always be 100% accurate.