@book{Umar200917772,
  title     = {Ushul Al-Fiqh Inda Ibn Daqiq Al-Ied},
  author    = {Umar Muhammad Sayyid Abd. Al-Aziz},
  publisher = {Dar As-Salam},
  year      = {2009},
  isbn      = {978-977-342-807},
}