Não informado. (1886). Annals of the Cape Observatory. Royal Observatory.
Chicago (17e ed.) BronvermeldingNão informado. Annals of the Cape Observatory. London: Royal Observatory, 1886.
MLA (8e ed.) BronvermeldingNão informado. Annals of the Cape Observatory. Royal Observatory, 1886.
Let op: Deze citaties zijn niet altijd 100% accuraat.