APA (7th ed.) Citation

Wiita, P. J. Active galactic nuclei. North-Holland.

Chicago Style (17th ed.) Citation

Wiita, Paul J. Active Galactic Nuclei. Amsterdam: North-Holland.

MLA (9th ed.) Citation

Wiita, Paul J. Active Galactic Nuclei. North-Holland.

Warning: These citations may not always be 100% accurate.