APA (7th ed.) Citation

Ellyard, D., & Tirion, W. (1993). The southern sky guide. Cambridge University Press.

Chicago Style (17th ed.) Citation

Ellyard, David, and Wil Tirion. The Southern Sky Guide. Cambridge [England] ; New York, NY, USA: Cambridge University Press, 1993.

MLA (8th ed.) Citation

Ellyard, David, and Wil Tirion. The Southern Sky Guide. Cambridge University Press, 1993.