APA (7th ed.) Citation

International Astronomical Union. (1920). Report on organization of International Astronomical Union. [publisher not identified].

Chicago Style (17th ed.) Citation

International Astronomical Union. Report on Organization of International Astronomical Union. Washington: [publisher not identified], 1920.

MLA (9th ed.) Citation

International Astronomical Union. Report on Organization of International Astronomical Union. [publisher not identified], 1920.

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