APA (7th ed.) Citation

Rükl, A., & Gribbin, J. (1979). The amateur astronomer. Octopus Books.

Chicago Style (17th ed.) Citation

Rükl, Antonín, and John Gribbin. The Amateur Astronomer. London: Octopus Books, 1979.

MLA (9th ed.) Citation

Rükl, Antonín, and John Gribbin. The Amateur Astronomer. Octopus Books, 1979.