Ayub, Hasan Fiqh al-mu'amalat al-maliyyah fi al-islami : al-Buyuun wa riba wal-qardu wassallam / Hasan Ayub - Qahirah : Dar al-Tauzi al-nashr , 1998 - 2 vol. ; 24 cm. wakaf dari Dr. Halim ISBN: 9772651718 RM70.00 Subjects--Topical Terms: Contracts (Islamic law)Mualamat--Islamic law