APA (7th ed.) Citation

Davies, R., & Smith, F. G. (1971). The Crab Nebula. Springer Netherlands.

Chicago Style (17th ed.) Citation

Davies, Ray, and F. G. Smith. The Crab Nebula. Dordrecht: Springer Netherlands, 1971.

MLA (9th ed.) Citation

Davies, Ray, and F. G. Smith. The Crab Nebula. Springer Netherlands, 1971.