APA aipamena

Duffett-Smith, P. (1979). Practical astronomy with your calculator. CUP.

Chicago Style aipamena

Duffett-Smith, Peter. Practical Astronomy with Your Calculator. Cambridge: CUP, 1979.

MLA aipamena

Duffett-Smith, Peter. Practical Astronomy with Your Calculator. CUP, 1979.