APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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