APA (7th ed.) Citation

Osterbrock, D. E. (2006). Astrophysics of gaseous nebulae and active galactic nuclei (2. ed.). University Science Books.

Chicago Style (17th ed.) Citation

Osterbrock, Donald E. Astrophysics of Gaseous Nebulae and Active Galactic Nuclei. 2. ed. Sausalito, Calif: University Science Books, 2006.

MLA (9th ed.) Citation

Osterbrock, Donald E. Astrophysics of Gaseous Nebulae and Active Galactic Nuclei. 2. ed. University Science Books, 2006.