Campbell, W. H. (1989). Quiet daily geomagnetic feilds. Birkhauser Verlag.
Chicago Style aipamenaCampbell, Wallace H. Quiet Daily Geomagnetic Feilds. Basel: Birkhauser Verlag, 1989.
MLA aipamenaCampbell, Wallace H. Quiet Daily Geomagnetic Feilds. Birkhauser Verlag, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.