Não informado. (1895). Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory.
Chicagoスタイル(17版)引用形式Não informado. Circular of the Astronomical Observatory of Harvard College. Cambridge, Mass: Harvard College, Astronomical Observatory, 1895.
MLA(8版)引用形式Não informado. Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory, 1895.
警告: この引用は必ずしも正確ではありません.