Cita APA (7th ed.)

Duffett-Smith, P. (1988). Practical astronomy with your calculator (3rd ed.). Cambridge University Press.

Cita Chicago (17th ed.)

Duffett-Smith, Peter. Practical Astronomy with Your Calculator. 3rd ed. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1988.

Cita MLA (8th ed.)

Duffett-Smith, Peter. Practical Astronomy with Your Calculator. 3rd ed. Cambridge University Press, 1988.