APA (7th ed.) Citation
Duffett-Smith, P., & Zwart, J. (2011). Practical astronomy with your calculator or spreadsheet. Cambridge University Press.
Chicago Style (17th ed.) Citation
Duffett-Smith, Peter, and Jonathan Zwart. Practical Astronomy with Your Calculator or Spreadsheet. Cambridge ; New York: Cambridge University Press, 2011.
MLA (9th ed.) Citation
Duffett-Smith, Peter, and Jonathan Zwart. Practical Astronomy with Your Calculator or Spreadsheet. Cambridge University Press, 2011.
Warning: These citations may not always be 100% accurate.