Heinrich,Walter. Vegetation of the earth and ecological systems of the geobiospere.
Chicago Style (17th ed.) ZitazioaHeinrich,Walter. Vegetation of the Earth and Ecological Systems of the Geobiospere.
MLA (9th ed.) ZitazioaHeinrich,Walter. Vegetation of the Earth and Ecological Systems of the Geobiospere.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.