APA (7th ed.) Citation

Roy, A. E., & Clarke, D. (1989). Astronomy: Structure of the universe (3rd ed.). Adam Hilger.

Chicago Style (17th ed.) Citation

Roy, Archie Edmiston, and D. Clarke. Astronomy: Structure of the Universe. 3rd ed. New York: Adam Hilger, 1989.

MLA (9th ed.) Citation

Roy, Archie Edmiston, and D. Clarke. Astronomy: Structure of the Universe. 3rd ed. Adam Hilger, 1989.