Jama'karamat al-auliya.
Indeks Diterjemahkan dari : Why didn't I think of that? Bibliografi : hlm. 447-450
Nuansa Ramadhan.
Models of Teaching.
Bibliografi hlm.:163-171. SAS 2X2.
Judul Asli; Research Design: Qualitative, Quantitative, and Mixed Methods Approaches
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