APA (7th ed.) Citation

International Astronomical Union. (1955). Symposium / International Astronomical Union. Reidel.

Chicago Style (17th ed.) Citation

International Astronomical Union. Symposium / International Astronomical Union. Dordrecht [u.a.]: Reidel, 1955.

MLA (9th ed.) Citation

International Astronomical Union. Symposium / International Astronomical Union. Reidel, 1955.

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