APA (7th ed.) Citation

Duffett-Smith, P. (1981). Practical astronomy with your calculator (2nd ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Duffett-Smith, Peter. Practical Astronomy with Your Calculator. 2nd ed. Cambridge [England] ; New York: Cambridge University Press, 1981.

MLA (9th ed.) Citation

Duffett-Smith, Peter. Practical Astronomy with Your Calculator. 2nd ed. Cambridge University Press, 1981.