Cita APA

League of Nations. (1928). Official vital statistics of Switzerland. [s.n.].

Citación estilo Chicago

League of Nations. Official Vital Statistics of Switzerland. Geneva: [s.n.], 1928.

Cita MLA

League of Nations. Official Vital Statistics of Switzerland. [s.n.], 1928.

Warning: These citations may not always be 100% accurate.