APA (7e ed.) Bronvermelding

Não informado. (1939). Geological survey paper: Mines and geology branch. Department of Mines and Technical Surveys, Geological Survey.

Chicago (17e ed.) Bronvermelding

Não informado. Geological Survey Paper: Mines and Geology Branch. Ottawa: Department of Mines and Technical Surveys, Geological Survey, 1939.

MLA (8e ed.) Bronvermelding

Não informado. Geological Survey Paper: Mines and Geology Branch. Department of Mines and Technical Surveys, Geological Survey, 1939.

Let op: Deze citaties zijn niet altijd 100% accuraat.