APA (7th ed.) Citation

Ra'ana, I. M. (1992). Sistem ekonomi pemerintahan Umar Ibn Al Khatab. Pustaka firdaus.

Chicago Style (17th ed.) Citation

Ra'ana, Irfan Mahmud. Sistem Ekonomi Pemerintahan Umar Ibn Al Khatab. Pustaka firdaus, 1992.

MLA (8th ed.) Citation

Ra'ana, Irfan Mahmud. Sistem Ekonomi Pemerintahan Umar Ibn Al Khatab. Pustaka firdaus, 1992.

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