APA (7th ed.) Citation

Roy, A. E., & Clarke, D. (2003). Astronomy: Principles and practice (4th ed.). Institute of Physics Pub..

Chicago Style (17th ed.) Citation

Roy, A. E., and D. Clarke. Astronomy: Principles and Practice. 4th ed. Bristol, UK ; Philadelphia: Institute of Physics Pub., 2003.

MLA (9th ed.) Citation

Roy, A. E., and D. Clarke. Astronomy: Principles and Practice. 4th ed. Institute of Physics Pub., 2003.