APA (7th ed.) Citation

Ruggieri, G., & Bayliss, D. D. (1969). Secrets of the sky. Hamlyn.

Chicago Style (17th ed.) Citation

Ruggieri, Guido, and Deryck D. Bayliss. Secrets of the Sky. London: Hamlyn, 1969.

MLA (9th ed.) Citation

Ruggieri, Guido, and Deryck D. Bayliss. Secrets of the Sky. Hamlyn, 1969.

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