Não informado. (1973). Seed science and technology. International Seed Testing Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Seed Science and Technology. Zurich, Suíça: International Seed Testing Association, 1973.
Lua MLA (8ú heag.)Não informado. Seed Science and Technology. International Seed Testing Association, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.