Izvornik: Das grosse Umweltliederbuch. Mein Freund, der Baum. Voice sheet music. Das grosse Umweltliederbuch edited by Wolfgang Ahrens.
Prijevod: Veliki pjesmarica okoliša. Reinhard Mey, Peter Maffay, esteri i Abi Ofarim, Alexandra, Pete Seeger, Rolf Harris i Beatlesa.