Newton, R. G. (1993). What makes nature tick? Harward University press.
Chicago Style aipamenaNewton, Roger. G. What Makes Nature Tick? Cambridge: Harward University press, 1993.
MLA aipamenaNewton, Roger. G. What Makes Nature Tick? Harward University press, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.