Não informado. (2001). Bulletin of the Astronomical Institutes of Czeschoslovakia. Astronomical Institutes of Czeschoslovakia.
Cita Chicago Style (17a ed.)Não informado. Bulletin of the Astronomical Institutes of Czeschoslovakia. Prague: Astronomical Institutes of Czeschoslovakia, 2001.
Cita MLA (8a ed.)Não informado. Bulletin of the Astronomical Institutes of Czeschoslovakia. Astronomical Institutes of Czeschoslovakia, 2001.
Precaución: Estas citas no son 100% exactas.