APA (7th ed.) Citation

Vennerstrøm, S. (1994). Geomagnetic polar cap (PC) index, 1975-1993. World Data Center A for Solar-Terrestrial Physics, National Geophysical Data Center.

Chicago Style (17th ed.) Citation

Vennerstrøm, S. Geomagnetic Polar Cap (PC) Index, 1975-1993. Boulder, CO: World Data Center A for Solar-Terrestrial Physics, National Geophysical Data Center, 1994.

MLA (9th ed.) Citation

Vennerstrøm, S. Geomagnetic Polar Cap (PC) Index, 1975-1993. World Data Center A for Solar-Terrestrial Physics, National Geophysical Data Center, 1994.