Gaya APA

AL-KAAF, A, Z. (2001). KHALIFAH UMAR BIN KHATHTHAB . BANDUNG: PUSTAKA SETIA.

Gaya MLA

AL-KAAF, ABDULLAH, ZAKY. "KHALIFAH UMAR BIN KHATHTHAB". BANDUNG: PUSTAKA SETIA, 2001. Text.