Rushforth, S. R. (1976). The plant kingdom: Evolution and form. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Rushforth, Samuel R. The Plant Kingdom: Evolution and Form. Englewood Cliffs, N.J: Prentice-Hall, 1976.
Lua MLA (9ú heag.)Rushforth, Samuel R. The Plant Kingdom: Evolution and Form. Prentice-Hall, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.