al-Bahth al-'ilmi'ind'ulama' al-hadith : usuluh wa manahijuh naqdan wa tahlilan - Abubakar, Abdalla Mohamed (Bangi : Fakulti Pengajian Islam, Universiti Kebangsaan Malaysia, 1995)
Tesis (Ph.D,) Fakulti Pengajian Islam UKM, 1995
p. 493-508
Keywords: Hadith -- Evidences, authority, etc