APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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