Rogerson, B. (2012). Sejarah empat khalifah [Para penerus Muhammad]. Mitra Buku.
Chicago Style (17th ed.) CitationRogerson, Barnaby. Sejarah Empat Khalifah [Para Penerus Muhammad]. Mitra Buku, 2012.
MLA (8th ed.) CitationRogerson, Barnaby. Sejarah Empat Khalifah [Para Penerus Muhammad]. Mitra Buku, 2012.
Warning: These citations may not always be 100% accurate.