Cita APA

Usman, Z. (1990). Umar Bin Khattab Khalifah Kedua. Widjaya.

Citación estilo Chicago

Usman, Zuber. Umar Bin Khattab Khalifah Kedua. Widjaya, 1990.

Cita MLA

Usman, Zuber. Umar Bin Khattab Khalifah Kedua. Widjaya, 1990.

Warning: These citations may not always be 100% accurate.