↑"Zamzam Studies and Research Centre," Saudi Geological Survey, 19 Iunii 2013.
Bibliographia
Hawting, G. R. 1980. The Disappearance and Rediscovery of Zamzam and the 'Well of the Ka'ba'. Bulletin of the School of Oriental and African Studies (Universitas Londiniensis) 43(1):44–54.
Koshak, Yahya Hamza. 1999. Zamzam: The Holy Water. Jeddah: Koshak Research Institute.