Cita APA (7a ed.)

Friis-Christensen, E., & Lassen, K. (1992). Global temperature variations and possible association with solar activity variations. Danish Meteorological Institute.

Cita Chicago Style (17a ed.)

Friis-Christensen, Eigil, y K. Lassen. Global Temperature Variations and Possible Association with Solar Activity Variations. Copenhagen: Danish Meteorological Institute, 1992.

Cita MLA (9a ed.)

Friis-Christensen, Eigil, y K. Lassen. Global Temperature Variations and Possible Association with Solar Activity Variations. Danish Meteorological Institute, 1992.