APA aipamena

Felix Pirani & Christine Roche. (1997). The universe for beginners. Harper Collins.

Chicago Style aipamena

Felix Pirani and Christine Roche. The Universe for Beginners. London: Harper Collins, 1997.

MLA aipamena

Felix Pirani and Christine Roche. The Universe for Beginners. Harper Collins, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.