Παραπομπή APA

Campbell, W. . H. (1997). Introduction to geomagnetic fields. Cambridge University Press.

Παραπομπή Chicago Style

Campbell, Wallace H. Introduction to Geomagnetic Fields. UK: Cambridge University Press, 1997.

Παραπομπή MLA

Campbell, Wallace H. Introduction to Geomagnetic Fields. Cambridge University Press, 1997.