Gaya APA

Baali, F, &, A, W. (1989). Ibn Khaldun dan pola pemikiran Islam. : Ibn Khaldun and islamic thought style. 1981. . Jakarta: Pustaka Firdaus.

Gaya MLA

Baali, Fuad, &, Ali, Wardi. "Ibn Khaldun dan pola pemikiran Islam. : Ibn Khaldun and islamic thought style. 1981. ". Jakarta: Pustaka Firdaus, 1989. Buku.