APA aipamena

Pentz, M. J. (1975). Earth history I and II S100 26 and 27. Open University Press.

Chicago Style aipamena

Pentz, M. J. Earth History I and II S100 26 and 27. Open University Press, 1975.

MLA aipamena

Pentz, M. J. Earth History I and II S100 26 and 27. Open University Press, 1975.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.