Cita APA (7a ed.)

Peterson, B. M. (1997). An introduction to active galactic nuclei. Cambridge University Press.

Cita Chicago Style (17a ed.)

Peterson, Bradley M. An Introduction to Active Galactic Nuclei. Cambridge: Cambridge University Press, 1997.

Cita MLA (9a ed.)

Peterson, Bradley M. An Introduction to Active Galactic Nuclei. Cambridge University Press, 1997.