Proceedings of the Soil Science Conference of Malaysia 2013: Good Agriculture Practices for Soil Health Sustainability, 16-18 April 2013, Bukit Gambang Resort City, Kuantan, Pahang: Kuantan, Pahang (Malaysia), 16-18 Apr 2013, p. 184-188
Herbal Globalisation : A New Paradigm for Malaysian Herbal Industry : Proceedings of the Seminar on Medicinal and Aromatic Plants (MAPS 2008): Kuala Lumpur (Malaysia), 21-22 Oct 2008, p. 454-459