Não informado. (1973). Information brochure. Fuel Research Institute of South Africa.
Lua i Stíl Chicago (17ú heag.)Não informado. Information Brochure. Pretoria, Africa do Sul: Fuel Research Institute of South Africa, 1973.
Lua MLA (8ú heag.)Não informado. Information Brochure. Fuel Research Institute of South Africa, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.