APA (7th ed.) Citation

Krolik, J. H. (1999). Active galactic nuclei: From the central black hole to the galactic environment. Princeton Univ. Press.

Chicago Style (17th ed.) Citation

Krolik, Julian H. Active Galactic Nuclei: From the Central Black Hole to the Galactic Environment. Princeton: Princeton Univ. Press, 1999.

MLA (9th ed.) Citation

Krolik, Julian H. Active Galactic Nuclei: From the Central Black Hole to the Galactic Environment. Princeton Univ. Press, 1999.