APA (7th ed.) Citation

Birney, D. S., Gonzalez, G., & Oesper, D. (2006). Observational astronomy (2nd ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Birney, D. Scott, Guillermo Gonzalez, and David Oesper. Observational Astronomy. 2nd ed. Cambridge, UK ; New York: Cambridge University Press, 2006.

MLA (9th ed.) Citation

Birney, D. Scott, et al. Observational Astronomy. 2nd ed. Cambridge University Press, 2006.