APA (7th ed.) Citation

Friis-Christensen, E. (1989). Ground magnetic perturbations in the polar cap and cleft: Structure and dynamics of ionospheric currents. Danish Meteorological Institute.

Chicago Style (17th ed.) Citation

Friis-Christensen, Eigil. Ground Magnetic Perturbations in the Polar Cap and Cleft: Structure and Dynamics of Ionospheric Currents. Copenhagen: Danish Meteorological Institute, 1989.

MLA (9th ed.) Citation

Friis-Christensen, Eigil. Ground Magnetic Perturbations in the Polar Cap and Cleft: Structure and Dynamics of Ionospheric Currents. Danish Meteorological Institute, 1989.