1. Ministry of Energy, Telecommunications and Post Malaysia: National energy balances: Malaysia 1978–1988∗ Kuala Lumpur,1989
2. Malaysia Agricultural Directory and Index 89/90,1990
3. Malaysia Agricultural Directory and Index 93/94,1995
4. Wood energy in Malaysia;Baharudin;RERIC International Energy Journal,1989
5. Biomass production and technology in Malaysia;Farid,1983