National Conference on River '99 : Towards Susstainable Development & Chan, N. W. (2002). Rivers: Towards sustainable development : [proceedings]. Pulau Pinang : Penerbit Universiti Sains Malaysia.
Chicago-viite (17. p.)National Conference on River '99 : Towards Susstainable Development ja Ngai Weng Chan. Rivers: Towards Sustainable Development : [proceedings]. Pulau Pinang : Penerbit Universiti Sains Malaysia, 2002.
MLA-viite (9. p.)National Conference on River '99 : Towards Susstainable Development ja Ngai Weng Chan. Rivers: Towards Sustainable Development : [proceedings]. Pulau Pinang : Penerbit Universiti Sains Malaysia, 2002.
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