Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. University of Groningen.
Style de citation Chicago (17e éd.)Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. Groningen, Holanda: University of Groningen.
Style de citation MLA (8e éd.)Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. University of Groningen.
Attention : ces citations peuvent ne pas être correctes à 100%.