Cita APA (7th ed.)

Osterbrock, D. E. (1974). Astrophysics of gaseous nebulae. W. H. Freeman.

Cita Chicago (17th ed.)

Osterbrock, Donald E. Astrophysics of Gaseous Nebulae. San Francisco: W. H. Freeman, 1974.

Cita MLA (8th ed.)

Osterbrock, Donald E. Astrophysics of Gaseous Nebulae. W. H. Freeman, 1974.