Não informado. (1999). Bulletin of the Czech Geological Survey. Czech Geological Survey.
Style de citation Chicago (17e éd.)Não informado. Bulletin of the Czech Geological Survey. Praha: Czech Geological Survey, 1999.
Style de citation MLA (8e éd.)Não informado. Bulletin of the Czech Geological Survey. Czech Geological Survey, 1999.
Attention : ces citations peuvent ne pas être correctes à 100%.