Não informado. (1855). Annals of the Astronomical Observatory of Harvard College. Harvard College Observatory.
Style de citation Chicago (17e éd.)Não informado. Annals of the Astronomical Observatory of Harvard College. Cambridge, Mass: Harvard College Observatory, 1855.
Style de citation MLA (8e éd.)Não informado. Annals of the Astronomical Observatory of Harvard College. Harvard College Observatory, 1855.
Attention : ces citations peuvent ne pas être correctes à 100%.