Não informado. (1950). Colonial Geology and Mineral Resources. Colonial Geological Survey.
Cita Chicago Style (17a ed.)Não informado. Colonial Geology and Mineral Resources. London: Colonial Geological Survey, 1950.
Cita MLA (8a ed.)Não informado. Colonial Geology and Mineral Resources. Colonial Geological Survey, 1950.
Precaución: Estas citas no son 100% exactas.