APA (7th ed.) Citation

Baker, D., & Hardy, D. A. (1978). The Hamlyn guide to astronomy. Hamlyn.

Chicago Style (17th ed.) Citation

Baker, David, and David Andrews Hardy. The Hamlyn Guide to Astronomy. London [etc.]: Hamlyn, 1978.

MLA (9th ed.) Citation

Baker, David, and David Andrews Hardy. The Hamlyn Guide to Astronomy. Hamlyn, 1978.