Botswana. Geological Survey and Mines Dept. Annual reports. Govt. Printer.
Cita Chicago (17th ed.)Botswana. Geological Survey and Mines Dept. Annual Reports. Gaborone,: Govt. Printer.
Cita MLA (8th ed.)Botswana. Geological Survey and Mines Dept. Annual Reports. Govt. Printer.
Atenció: Aquestes cites poden no estar 100% correctes.