Svenonius, B. (1938). Contributions to the photographic study of colour, resolution and total magnitude of anagalactic objects: With special regard to objects photographed at Helwan, by. Published by the Observatory.
Citação norma ChicagoSvenonius, Björn. Contributions to the Photographic Study of Colour, Resolution and Total Magnitude of Anagalactic Objects: With Special Regard to Objects Photographed at Helwan, by. Lund, Sweden: Published by the Observatory, 1938.
Citação norma MLASvenonius, Björn. Contributions to the Photographic Study of Colour, Resolution and Total Magnitude of Anagalactic Objects: With Special Regard to Objects Photographed at Helwan, by. Published by the Observatory, 1938.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.