APA Edition Citation

Roy, A. C., D. (2003). Astronomy: Principles and practice (4.).

Chicago Edition Citation

Roy, AE; Clarke, D. Astronomy: Principles and Practice. 4. LoP, 2003.

MLA Edition Citation

Roy, AE; Clarke, D. Astronomy: Principles and Practice. 4. 2003.

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