Não informado. (1976). Systematic Botany. American Society of Plant Taxonomists.
Lua i Stíl Chicago (17ú heag.)Não informado. Systematic Botany. Kent, Ohio: American Society of Plant Taxonomists, 1976.
Lua MLA (8ú heag.)Não informado. Systematic Botany. American Society of Plant Taxonomists, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.