Não informado. (2001). Short paper. Geological Survey of Sierra Leone.
Style de citation Chicago (17e éd.)Não informado. Short Paper. Freetown: Geological Survey of Sierra Leone, 2001.
Style de citation MLA (8e éd.)Não informado. Short Paper. Geological Survey of Sierra Leone, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.