League of Nations. (1928). Official vital statistics of Switzerland. [s.n.].
Chicagoスタイル(17版)引用形式League of Nations. Official Vital Statistics of Switzerland. Geneva: [s.n.], 1928.
MLA(9版)引用形式League of Nations. Official Vital Statistics of Switzerland. [s.n.], 1928.
警告: この引用は必ずしも正確ではありません.