Não informado. Publications of the Earth Physics Branch. Department of Energy, Mines and Resources.
Citação do estilo Chicago (17ª ed.)Não informado. Publications of the Earth Physics Branch. Ottawa: Department of Energy, Mines and Resources.
Citação MLA (8ª ed.)Não informado. Publications of the Earth Physics Branch. Department of Energy, Mines and Resources.
Atenció: Aquestes cites poden no estar 100% correctes.