APA (7th ed.) Citation

League of Nations. Secretariat. Economic and Financial Section, Population and natural resources, & International Economic Conference. (1927). International Economic Conference. Geneva, May 1927. Documentation. Population and natural resources. [s.n.].

Chicago Style (17th ed.) Citation

League of Nations. Secretariat. Economic and Financial Section, Population and natural resources, and International Economic Conference. International Economic Conference. Geneva, May 1927. Documentation. Population and Natural Resources. Geneva: [s.n.], 1927.

MLA (9th ed.) Citation

League of Nations. Secretariat. Economic and Financial Section, et al. International Economic Conference. Geneva, May 1927. Documentation. Population and Natural Resources. [s.n.], 1927.