Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. University of Groningen.
Chicago Style (17th ed.) CitationNão informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. Groningen, Holanda: University of Groningen.
MLA (8th ed.) CitationNão informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. University of Groningen.
Warning: These citations may not always be 100% accurate.