Não informado. (1895). Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory.
Style de citation Chicago (17e éd.)Não informado. Circular of the Astronomical Observatory of Harvard College. Cambridge, Mass: Harvard College, Astronomical Observatory, 1895.
Style de citation MLA (8e éd.)Não informado. Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory, 1895.
Attention : ces citations peuvent ne pas être correctes à 100%.