Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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