Não informado. (1895). Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory.
Chicago-Zitierstil (17. Ausg.)Não informado. Circular of the Astronomical Observatory of Harvard College. Cambridge, Mass: Harvard College, Astronomical Observatory, 1895.
MLA-Zitierstil (8. Ausg.)Não informado. Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory, 1895.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.