Não informado. (2008). Forestry Bulletin. Duke University, School of Forestry.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Forestry Bulletin. Durham, NC: Duke University, School of Forestry, 2008.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Forestry Bulletin. Duke University, School of Forestry, 2008.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.