APA (7th ed.) Citation

Roy, A. E., & Clarke, D. (1977). Astronomy: Structure of the universe (1. publ.). Hilger.

Chicago Style (17th ed.) Citation

Roy, Archie E., and David Clarke. Astronomy: Structure of the Universe. 1. publ. Bristol: Hilger, 1977.

MLA (9th ed.) Citation

Roy, Archie E., and David Clarke. Astronomy: Structure of the Universe. 1. publ. Hilger, 1977.

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