APA (7e ed.) Bronvermelding

Não informado. (1898). Annals of Lowell Observatory, Flagstaff, Arizona. Lowell Observatory.

Chicago (17e ed.) Bronvermelding

Não informado. Annals of Lowell Observatory, Flagstaff, Arizona. Boston, Mass: Lowell Observatory, 1898.

MLA (8e ed.) Bronvermelding

Não informado. Annals of Lowell Observatory, Flagstaff, Arizona. Lowell Observatory, 1898.

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