APA (7th ed.) Citation

Kleczek, J., & Jakeš, P. (1987). The universe and planet Earth. Octopus Books.

Chicago Style (17th ed.) Citation

Kleczek, Josip, and Petr Jakeš. The Universe and Planet Earth. London: Octopus Books, 1987.

MLA (9th ed.) Citation

Kleczek, Josip, and Petr Jakeš. The Universe and Planet Earth. Octopus Books, 1987.