Não informado. (2008). Forestry Bulletin. Duke University, School of Forestry.
Chicago-referens (17:e uppl.)Não informado. Forestry Bulletin. Durham, NC: Duke University, School of Forestry, 2008.
MLA-referens (8:e uppl.)Não informado. Forestry Bulletin. Duke University, School of Forestry, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.