APA (7th ed.) Citation

Mackay, B. R. (1940). Preliminary map: Pembina Forks, Alberta. Canada Dept. of Mines and Resources.

Chicago Style (17th ed.) Citation

Mackay, B. R. Preliminary Map: Pembina Forks, Alberta. Ottawa: Canada Dept. of Mines and Resources, 1940.

MLA (9th ed.) Citation

Mackay, B. R. Preliminary Map: Pembina Forks, Alberta. Canada Dept. of Mines and Resources, 1940.