Não informado. (1961). International yearbook of cartography. Kirschbaum Verlag.
Style de citation Chicago (17e éd.)Não informado. International Yearbook of Cartography. Bonn, Alemanha: Kirschbaum Verlag, 1961.
Style de citation MLA (8e éd.)Não informado. International Yearbook of Cartography. Kirschbaum Verlag, 1961.
Attention : ces citations peuvent ne pas être correctes à 100%.