APA (7th ed.) Citation

Bely, P., Christian, C., & Roy, J. (2010). A Question and Answer Guide to Astronomy.

Chicago Style (17th ed.) Citation

Bely, Pierre-Yves, Carol Christian, and Jean-René Roy. A Question and Answer Guide to Astronomy. 2010.

MLA (9th ed.) Citation

Bely, Pierre-Yves, et al. A Question and Answer Guide to Astronomy. 2010.