APA (7e ed.) Bronvermelding

Não informado. (1950). Bibliographical Series. Department of Mines and Technical Surveys.

Chicago (17e ed.) Bronvermelding

Não informado. Bibliographical Series. Ottawa: Department of Mines and Technical Surveys, 1950.

MLA (8e ed.) Bronvermelding

Não informado. Bibliographical Series. Department of Mines and Technical Surveys, 1950.

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