Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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