Não informado. (1889). Annals of the Tokyo Astronomical Observatory. University of Tokyo.
Chicago-viite (17. p.)Não informado. Annals of the Tokyo Astronomical Observatory. Tokyo: University of Tokyo, 1889.
MLA-viite (8. p.)Não informado. Annals of the Tokyo Astronomical Observatory. University of Tokyo, 1889.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.