Bibliografi hlm.:163-171. SAS 2X2.
Judul Asli; Research Design: Qualitative, Quantitative, and Mixed Methods Approaches
Buku
Judul asli: The sufi of knowledge.
Judul asli: Islam and warld peace.
Judul asli: Maqaalat Al Islaamiyyiin waikhtilaaf Almushalliin, Jilid I.
SAS 2X2.1.