Não informado. (1977). South African journal of chemistry. Foundation for Education, Science and Technology.
Lua i Stíl Chicago (17ú heag.)Não informado. South African Journal of Chemistry. Pretoria, Africa do Sul: Foundation for Education, Science and Technology, 1977.
Lua MLA (8ú heag.)Não informado. South African Journal of Chemistry. Foundation for Education, Science and Technology, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.