APA (7e ed.) Bronvermelding

Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. University of Groningen.

Chicago (17e ed.) Bronvermelding

Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. Groningen, Holanda: University of Groningen.

MLA (8e ed.) Bronvermelding

Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. University of Groningen.

Let op: Deze citaties zijn niet altijd 100% accuraat.