Muhammad Syafi`i Antonio
ProLM centre & Tazkia publishing, 2009
Buku Teks
Budi Sumadiyo
Gramedia Pustaka Utama, 2008
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Davies, W.H.
London Jonathan Cape 1927
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Mosteri, Moel
Warner Books, 1976
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Foxley, Eric
Addison-Wesley, 1985
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