| Zainuddin R Ritonga Fiqh Ibadah, 2002 | 83 | 2002 |
| Fiqh ibadah AR Ritonga, Z Tanjung Edaran Kalam, 1999 | 59 | 1999 |
| Zainuddin. 1997 R Ritonga Fiqih ibadah, 2008 | 20 | 2008 |
| Zainuddin.(2002) R Ritonga Fiqh Ibadah. Jakarta: Gaya Media Pratama, 2002 | 13 | 2002 |
| Fiqh Ibadah A Zainudin, R Ritonga Jakarta: Gaya Media Pratama, 1997 | 13 | 1997 |
| Rahasia Alam Semesta AR Ritonga, D Soekartadiredja Jakarta: Planetarium, 1979 | 7 | 1979 |
| Fiqh muamalah AR Ritonga Edaran Kalam, 1999 | 4 | 1999 |
