Bold, H. C. (1964). The plant kingdom. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Bold, Harold C. The Plant Kingdom. New Jersey: Prentice-Hall, 1964.
Lua MLA (9ú heag.)Bold, Harold C. The Plant Kingdom. Prentice-Hall, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.