Chan, B. (1998) Concerns of the industry on tree plantations in Sarawak. In Chan, B. Kho, PCS., Lee HS. (eds) Proceedings of planted forests in Sarawak. Vi-xii. an International conference, 16-17 February 1998, Kuching, Sarawak.
Department of Statistics Malysia, Sarawak. (2012) Yearbook of Statistics Sarawak 2012. Kuching.