@book{Ali199911897,
  title     = {Mausuah Al-Qawaid wa Adh-Dhawabith Al-Fiqhiyyah: Al-Hakimah Lilmuamalat Al-Maliyyah fi Al-Fiqh Al-Islami Jilid 1},
  author    = {Ali Ahmad An-Nadawi},
  year      = {1999},
}