N.D.G.James. (1990). The Arboricculturalist's Companion: A guide to the care of Trees. Basil Blackwell.
Chicago Style aipamenaN.D.G.James. The Arboricculturalist's Companion: A Guide to the Care of Trees. Basil Blackwell, 1990.
MLA aipamenaN.D.G.James. The Arboricculturalist's Companion: A Guide to the Care of Trees. Basil Blackwell, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.