Harding, J. (2003). Cambridge essential science: Teacher CD- ROM. Cambridge: Cambridge University Press.
Chicago Style aipamenaHarding, John. Cambridge Essential Science: Teacher CD- ROM. Cambridge: Cambridge University Press, 2003.
MLA aipamenaHarding, John. Cambridge Essential Science: Teacher CD- ROM. Cambridge: Cambridge University Press, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.