Heithausen, A. (1987). The ring around the neck of the giraffe: Galactic cirrus clouds associated with the Polar Loop. Universität Bonn.
Chicago Style (17th ed.) CitationHeithausen, Andreas. The Ring Around the Neck of the Giraffe: Galactic Cirrus Clouds Associated with the Polar Loop. Germany: Universität Bonn, 1987.
Cita MLAHeithausen, Andreas. The Ring Around the Neck of the Giraffe: Galactic Cirrus Clouds Associated with the Polar Loop. Universität Bonn, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.