Não informado. (2001). Bulletin of the Astronomical Institutes of Czeschoslovakia. Astronomical Institutes of Czeschoslovakia.
Chicago-Zitierstil (17. Ausg.)Não informado. Bulletin of the Astronomical Institutes of Czeschoslovakia. Prague: Astronomical Institutes of Czeschoslovakia, 2001.
MLA-Zitierstil (8. Ausg.)Não informado. Bulletin of the Astronomical Institutes of Czeschoslovakia. Astronomical Institutes of Czeschoslovakia, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.