RUPIAH: Economics: Agents, Pilgrims, and Profits – Sylvia Chiffoleau (2015) – Book Chapter in The Hajj: Pilgrimage in IslamAugust 18, 2020 Lebih lanjut
RUPIAH: Is it necessary to have Islamic economics? – Chapra (2000) – The Journal of Socio-EconomicsAugust 5, 2020 Lebih lanjut