İslam Nasıl Yozlaştırıldı / Vahyin Dininden Sapmalar, Hurafeler, Bid'atlar. Yeni Boyut. ISBN 9789756779309. ↑ Joseph Islam: „The Hajj and Umrah According to the Quran.“ [3.2.2020] ↑ „Die erfundene Religion und die Koranische Religion – Kapitel 36 (4): Hadsch (Pilgerfahrt).“ [3.2.2020] ↑ "Sahih al-Bukhari Book of Fighting for the Cause of Allah (al". amrayn.com.