APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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