APA (7th ed.) Citation

Wielen, R. (1982). HIPPARCOS proper motion. Scientific aspects of the Hipparcos space astrometry mission.

Chicago Style (17th ed.) Citation

Wielen, Roland. "HIPPARCOS Proper Motion." Scientific Aspects of the Hipparcos Space Astrometry Mission 1982.

MLA (9th ed.) Citation

Wielen, Roland. "HIPPARCOS Proper Motion." Scientific Aspects of the Hipparcos Space Astrometry Mission, 1982.

Warning: These citations may not always be 100% accurate.