APA
Tillekeratne L M K, de Silva Karnika, . (1997). Natural rubber: A more safer material than synthetic rubber. : Bulletin of the Rubber Research Institute of Sri Lanka.
Chicago
Tillekeratne L M K, de Silva Karnika, . 1997. Natural rubber: A more safer material than synthetic rubber. : Bulletin of the Rubber Research Institute of Sri Lanka.
Harvard
Tillekeratne L M K, de Silva Karnika, . (1997). Natural rubber: A more safer material than synthetic rubber. : Bulletin of the Rubber Research Institute of Sri Lanka.
MLA
Tillekeratne L M K, de Silva Karnika, . Natural rubber: A more safer material than synthetic rubber. : Bulletin of the Rubber Research Institute of Sri Lanka. 1997.