APA (7th ed.) Zitazioa
Cross, A., & Bowden, A. (2009). Essential primary science. Open University Press.
Chicago Style (17th ed.) Zitazioa
Cross, Alan, eta Adrian Bowden. Essential Primary Science. Maidenhead: Open University Press, 2009.
MLA (9th ed.) Zitazioa
Cross, Alan, eta Adrian Bowden. Essential Primary Science. Open University Press, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.