Kramers, R. E. (1996). The boreal forest. National Atlas of Canada: Draped like a great green searf across the shouders of North America, the boreal or "northen" forest is Canada's largest ecosystem. Ontario, Canada: Canadian Geographic.
Citación estilo ChicagoKramers, R. Eric. The Boreal Forest. National Atlas of Canada: Draped Like a Great Green Searf Across the Shouders of North America, the Boreal or "northen" Forest Is Canada's Largest Ecosystem. Ontario, Canada: Canadian Geographic, 1996.
Cita MLAKramers, R. Eric. The Boreal Forest. National Atlas of Canada: Draped Like a Great Green Searf Across the Shouders of North America, the Boreal or "northen" Forest Is Canada's Largest Ecosystem. Ontario, Canada: Canadian Geographic, 1996.
Precaución: Estas citas no son 100% exactas.