League of Nations. (1928). Official vital statistics of Switzerland. [s.n.].
Style de citation Chicago (17e éd.)League of Nations. Official Vital Statistics of Switzerland. Geneva: [s.n.], 1928.
Style de citation MLA (9e éd.)League of Nations. Official Vital Statistics of Switzerland. [s.n.], 1928.
Attention : ces citations peuvent ne pas être correctes à 100%.