APA (7th ed.) Zitazioa

Bothun, G. (1998). Modern cosmological observations and problems. Taylor & Francis.

Chicago Style (17th ed.) Zitazioa

Bothun, Greg. Modern Cosmological Observations and Problems. London: Taylor & Francis, 1998.

MLA (9th ed.) Zitazioa

Bothun, Greg. Modern Cosmological Observations and Problems. Taylor & Francis, 1998.