Lua APA (7ú heag.)
Kopas, P. S. (2007). Taking the air: Ideas and change in Canada's national parks. UBC Press.
Lua i Stíl Chicago (17ú heag.)
Kopas, Paul Sheldon. Taking the Air: Ideas and Change in Canada's National Parks. Vancouver: UBC Press, 2007.
Lua MLA (9ú heag.)
Kopas, Paul Sheldon. Taking the Air: Ideas and Change in Canada's National Parks. UBC Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.