APA (7th ed.) Citation

Hoyle, F., & Hoyle, G. (1970). Seven steps to the sun. Heinemann.

Chicago Style (17th ed.) Citation

Hoyle, Fred, and G. Hoyle. Seven Steps to the Sun. London: Heinemann, 1970.

MLA (9th ed.) Citation

Hoyle, Fred, and G. Hoyle. Seven Steps to the Sun. Heinemann, 1970.

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