Holmes, S. (1983). Outline of plant classification. Longman.
Lua i Stíl Chicago (17ú heag.)Holmes, Sandra. Outline of Plant Classification. London: Longman, 1983.
Lua MLA (9ú heag.)Holmes, Sandra. Outline of Plant Classification. Longman, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.