APA (7e ed.) Bronvermelding

Não informado. Observations of Variable Stars. Kapteyn Astronomical Laboratory.

Chicago (17e ed.) Bronvermelding

Não informado. Observations of Variable Stars. Groningen, Holanda: Kapteyn Astronomical Laboratory.

MLA (8e ed.) Bronvermelding

Não informado. Observations of Variable Stars. Kapteyn Astronomical Laboratory.

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