APA (7e ed.) Bronvermelding

Não informado. (1855). Annals of the Astronomical Observatory of Harvard College. Harvard College Observatory.

Chicago (17e ed.) Bronvermelding

Não informado. Annals of the Astronomical Observatory of Harvard College. Cambridge, Mass: Harvard College Observatory, 1855.

MLA (8e ed.) Bronvermelding

Não informado. Annals of the Astronomical Observatory of Harvard College. Harvard College Observatory, 1855.

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