Bold, H. C. (1970). The plant kingdom (3rd ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Bold, Harold Charles. The Plant Kingdom. 3rd ed. Englewood Cliffs, New Jersey: Prentice-Hall, 1970.
Lua MLA (9ú heag.)Bold, Harold Charles. The Plant Kingdom. 3rd ed. Prentice-Hall, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.