APA (7th ed.) Citation

Irion, R. (2001). Galaxies: Island universes. Reader's Digest.

Chicago Style (17th ed.) Citation

Irion, Robert. Galaxies: Island Universes. Pleasantville: Reader's Digest, 2001.

MLA (9th ed.) Citation

Irion, Robert. Galaxies: Island Universes. Reader's Digest, 2001.

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