Cita APA (7th ed.)

Kopas, P. S. (2007). Taking the air: Ideas and change in Canada's national parks. UBC Press.

Cita Chicago (17th ed.)

Kopas, Paul Sheldon. Taking the Air: Ideas and Change in Canada's National Parks. Vancouver: UBC Press, 2007.

Cita MLA (9th ed.)

Kopas, Paul Sheldon. Taking the Air: Ideas and Change in Canada's National Parks. UBC Press, 2007.