Gaya APA

Wolfson, H, [. (1959). Ibn Khaldun on attributes and predestination. Tjetakan ulang dari: Speculum, a journal of mediaeval studies, 34(1959) no.4. . Cambridge Mass: The Mediaeval Academy of America.

Gaya MLA

Wolfson, H.A., [1887-1974]. "Ibn Khaldun on attributes and predestination. Tjetakan ulang dari: Speculum, a journal of mediaeval studies, 34(1959) no.4. ". Cambridge Mass: The Mediaeval Academy of America, 1959. Buku.