Não informado. (1974). Plant Systematics and Evolution. Springer Verlag.
Lua i Stíl Chicago (17ú heag.)Não informado. Plant Systematics and Evolution. New York: Springer Verlag, 1974.
Lua MLA (8ú heag.)Não informado. Plant Systematics and Evolution. Springer Verlag, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.