APA Edition Citation

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

Chicago Edition Citation

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

MLA Edition Citation

Ruggieri, Deryck D. Secrets of the Sky. Hamlyn, 1969.

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