Não informado. (1976). Journal of the Rubber Research Institute of Sri Lanka. Rubber Research Institute of Sri Lanka.
Chicago-Zitierstil (17. Ausg.)Não informado. Journal of the Rubber Research Institute of Sri Lanka. Agalawatta, Sri Lanka: Rubber Research Institute of Sri Lanka, 1976.
MLA-Zitierstil (8. Ausg.)Não informado. Journal of the Rubber Research Institute of Sri Lanka. Rubber Research Institute of Sri Lanka, 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.