Não informado. (2001). Trees: Structure and function. Springer Verlag.
Lua i Stíl Chicago (17ú heag.)Não informado. Trees: Structure and Function. Berlin: Springer Verlag, 2001.
Lua MLA (8ú heag.)Não informado. Trees: Structure and Function. Springer Verlag, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.