APA (7th ed.) Citation

Duffett-Smith, P., & Zwart, J. (2011). Practical Astronomy with your Calculator or Spreadsheet (4th ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Duffett-Smith, Peter, and Jonathan Zwart. Practical Astronomy with Your Calculator or Spreadsheet. 4th ed. Leiden: Cambridge University Press, 2011.

MLA (8th ed.) Citation

Duffett-Smith, Peter, and Jonathan Zwart. Practical Astronomy with Your Calculator or Spreadsheet. 4th ed. Cambridge University Press, 2011.