Most of the material on this site was taken from collection of articles about Da'wah:

1. "Readings in: Methods of Da'wah. Methodological Civilizational Perspective: Vision & Mission", compiled by Abd El Khabeer M. Ata and Jamal Ahmed bashier Badi.

2. Additional material supplied by Omar Spahic, lecturer in Department of Usul Ad-Din and Comparative Religion.

3. Islamic Material from website of International Islamic University Malaysia:
    http://iiu.edu.my