Little, E. L. (1979). Forest trees of the United States and Canada: And how to identify them. Dover.
Citazione stile Chigago Style (17a edizione)Little, Elbert Luther. Forest Trees of the United States and Canada: And How to Identify Them. Nueva York: Dover, 1979.
Citatione MLA (9a ed.)Little, Elbert Luther. Forest Trees of the United States and Canada: And How to Identify Them. Dover, 1979.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.