Citazione Stile APA (7a Edizione)

(1978). British Columbia Alberta and the Yukon territory. National Geographic Society.

Citazione stile Chigago Style (17a edizione)

British Columbia Alberta and the Yukon Territory. Washington, D.C: National Geographic Society, 1978.

Citatione MLA (9a ed.)

British Columbia Alberta and the Yukon Territory. National Geographic Society, 1978.