APA
PNg T C, . (1976). Controlled upward tapping. : Proceedings of the Rubber Research Institute of Malaysia, Planters Conference 1976, Kuala Lumpur.
Chicago
PNg T C, . 1976. Controlled upward tapping. : Proceedings of the Rubber Research Institute of Malaysia, Planters Conference 1976, Kuala Lumpur.
Harvard
PNg T C, . (1976). Controlled upward tapping. : Proceedings of the Rubber Research Institute of Malaysia, Planters Conference 1976, Kuala Lumpur.
MLA
PNg T C, . Controlled upward tapping. : Proceedings of the Rubber Research Institute of Malaysia, Planters Conference 1976, Kuala Lumpur. 1976.
