Duffett-Smith, P. (2011). Practical astronomy with your calculator or spreadsheet (Fourth edition.). Cambridge University Press. https://doi.org/10.1017/CBO9780511861161
Chicago-Zitierstil (17. Ausg.)Duffett-Smith, Peter. Practical Astronomy with Your Calculator or Spreadsheet. Fourth edition. Cambridge: Cambridge University Press, 2011. https://doi.org/10.1017/CBO9780511861161.
MLA-Zitierstil (9. Ausg.)Duffett-Smith, Peter. Practical Astronomy with Your Calculator or Spreadsheet. Fourth edition. Cambridge University Press, 2011. https://doi.org/10.1017/CBO9780511861161.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.