European Space Agency, Perryman, M. A. C., & Battrick, B. T. The Hipparcos and Tycho catalogues: Astrometric and photometric star catalogues derived from the ESA Hipparcos space astronomy mission. European Space Agency.
Chicago Style (17th ed.) CitationEuropean Space Agency, M. A. C. Perryman, and Bruce T. Battrick. The Hipparcos and Tycho Catalogues: Astrometric and Photometric Star Catalogues Derived from the ESA Hipparcos Space Astronomy Mission. Nordwijk: European Space Agency.
MLA (9th ed.) CitationEuropean Space Agency, et al. The Hipparcos and Tycho Catalogues: Astrometric and Photometric Star Catalogues Derived from the ESA Hipparcos Space Astronomy Mission. European Space Agency.
Warning: These citations may not always be 100% accurate.