APA (7th ed.) Citation

Asimov, I., & Hantula, R. (2005). Exploring outer space. Gareth Stevens Pub..

Chicago Style (17th ed.) Citation

Asimov, Isaac, and Richard Hantula. Exploring Outer Space. Milwaukee, WI: Gareth Stevens Pub., 2005.

MLA (8th ed.) Citation

Asimov, Isaac, and Richard Hantula. Exploring Outer Space. Gareth Stevens Pub., 2005.

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