APA (7th ed.) Citation

Christiansen & Hamblin. (1990). Exploring the planets. Prentice Hall.

Chicago Style (17th ed.) Citation

Christiansen and Hamblin. Exploring the Planets. New Jersey: Prentice Hall, 1990.

MLA (8th ed.) Citation

Christiansen and Hamblin. Exploring the Planets. Prentice Hall, 1990.

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