APA (7th ed.) Citation

League of Nations. (1926). The official vital statistics of the Republic of Portugal. [s.n.].

Chicago Style (17th ed.) Citation

League of Nations. The Official Vital Statistics of the Republic of Portugal. Geneva: [s.n.], 1926.

MLA (9th ed.) Citation

League of Nations. The Official Vital Statistics of the Republic of Portugal. [s.n.], 1926.