Citazione Stile APA (7a Edizione)
International forestry students symposium wageningen, the Netherlands 30 september-7 october 1991. (1992). Forests, a growing concern. IUCN.
Citazione stile Chigago Style (17a edizione)
International forestry students symposium wageningen, the Netherlands 30 september-7 october 1991. Forests, a Growing Concern. Gland: IUCN, 1992.
Citatione MLA (9a ed.)
International forestry students symposium wageningen, the Netherlands 30 september-7 october 1991. Forests, a Growing Concern. IUCN, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.