APA (7th ed.) Citation

Haekal. (1999). Sejarah hidup Umar bin Al-Khattab. Pustaka Nasional Pte Ltd.

Chicago Style (17th ed.) Citation

Haekal. Sejarah Hidup Umar Bin Al-Khattab. Singapura: Pustaka Nasional Pte Ltd, 1999.

MLA (9th ed.) Citation

Haekal. Sejarah Hidup Umar Bin Al-Khattab. Pustaka Nasional Pte Ltd, 1999.

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