Cita APA (7a ed.)

Birney, S. D. (1991). Observational Astronomy. Cambridge University Press.

Cita Chicago Style (17a ed.)

Birney, Scott D. Observational Astronomy. Cambridge: Cambridge University Press, 1991.

Cita MLA (9a ed.)

Birney, Scott D. Observational Astronomy. Cambridge University Press, 1991.