Não informado. Tropical woods. Yale University, School of Forestry.
Chicago-viite (17. p.)Não informado. Tropical Woods. New Haven, Conn: Yale University, School of Forestry.
MLA-viite (8. p.)Não informado. Tropical Woods. Yale University, School of Forestry.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.