Cita APA (7a ed.)

Lassen, K. (1972). On the classification of high-latitude auroras. Det Danske Meteorologiske Institut.

Cita Chicago Style (17a ed.)

Lassen, K. On the Classification of High-latitude Auroras. Charlottenlund: Det Danske Meteorologiske Institut, 1972.

Cita MLA (9a ed.)

Lassen, K. On the Classification of High-latitude Auroras. Det Danske Meteorologiske Institut, 1972.