Cita APA (7a ed.)

Wilhjelm, J. (1971). Ground based geomagnetic measurements in Greenland: With an account of a survey in 1965 and a general summary of observations performed since 1587. Det Danske Meteorologiske Institut.

Cita Chicago Style (17a ed.)

Wilhjelm, J. Ground Based Geomagnetic Measurements in Greenland: With an Account of a Survey in 1965 and a General Summary of Observations Performed Since 1587. Charlottenlund: Det Danske Meteorologiske Institut, 1971.

Cita MLA (9a ed.)

Wilhjelm, J. Ground Based Geomagnetic Measurements in Greenland: With an Account of a Survey in 1965 and a General Summary of Observations Performed Since 1587. Det Danske Meteorologiske Institut, 1971.