Não informado. (1895). Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory.
Citação do estilo Chicago (17ª ed.)Não informado. Circular of the Astronomical Observatory of Harvard College. Cambridge, Mass: Harvard College, Astronomical Observatory, 1895.
Citação MLA (8ª ed.)Não informado. Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory, 1895.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.