Não informado. (1898). Annals of Lowell Observatory, Flagstaff, Arizona. Lowell Observatory.
Style de citation Chicago (17e éd.)Não informado. Annals of Lowell Observatory, Flagstaff, Arizona. Boston, Mass: Lowell Observatory, 1898.
Style de citation MLA (8e éd.)Não informado. Annals of Lowell Observatory, Flagstaff, Arizona. Lowell Observatory, 1898.
Attention : ces citations peuvent ne pas être correctes à 100%.