Não informado. (1931). Journal of the Rubber Research Institute of Malaya. Rubber Research Institute of Malaysia.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of the Rubber Research Institute of Malaya. Kuala Lumpur: Rubber Research Institute of Malaysia, 1931.
Lua MLA (8ú heag.)Não informado. Journal of the Rubber Research Institute of Malaya. Rubber Research Institute of Malaysia, 1931.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.