Proceedings of the Seminar on Medicinal and Aromatic Plants: Towards Modernisation of Research and Technology in Herbal Industries: Kuala Lumpur (Malaysia), 24-25 Jul 2002, p. 196-199
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. 184-190
Towards modernisation of research and technology in herbal industries: proceedings of the seminar on medicinal and aromatic plants: Kuala Lumpur (Malaysia), 24-25 Jul 2001, p. 181-184
Towards modernisation of research and technology in herbal industries: proceedings of the seminar on medicinal and aromatic plants: Kuala Lumpur (Malaysia), 24-25 Jul 2001, p. 111-119