APA (7th ed.) Citation

Anderson, P. (1961). Orbit unlimited: A science-fiction adventure. Pyramid Books.

Chicago Style (17th ed.) Citation

Anderson, Poul. Orbit Unlimited: A Science-fiction Adventure. New York: Pyramid Books, 1961.

MLA (9th ed.) Citation

Anderson, Poul. Orbit Unlimited: A Science-fiction Adventure. Pyramid Books, 1961.

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