APA (7th ed.) Zitazioa
(1985). Astrophysics of active galaxies and quasi-stellar objects. University Science Books.
Chicago Style (17th ed.) Zitazioa
Astrophysics of Active Galaxies and Quasi-stellar Objects. Mill Valley, CA: University Science Books, 1985.
MLA (9th ed.) Zitazioa
Astrophysics of Active Galaxies and Quasi-stellar Objects. University Science Books, 1985.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.