1. Abdeldaem, A. (2006). The General Theory of Commitment, JA, Aleppo-Syria, Aleppo University Publications.
2. Abu Al-Saud, R. (2006). Sources of commitment, New University House.
3. Abu Steit, A. (n.d), Sources of Commitment.
4. Al-Far, A, Malkawi, B. (2015), Sources of Obligation (Sources of Personal Right in Jordanian Law), Amman: Dar Al-Thaqafa.
5. Al-Sanhouri, A. (1952). Sources of Commitment, Cairo, Egyptian Universities Publishing House.