APA (7th ed.) Citation

Wielen, R. (1990). A comprehensive astrometric data base: An instrument for combining earth-bound observations with HIPPARCOS data. Inertial coordinate system on the sky.

Chicago Style (17th ed.) Citation

Wielen, Roland. "A Comprehensive Astrometric Data Base: An Instrument for Combining Earth-bound Observations with HIPPARCOS Data." Inertial Coordinate System on the Sky 1990.

MLA (9th ed.) Citation

Wielen, Roland. "A Comprehensive Astrometric Data Base: An Instrument for Combining Earth-bound Observations with HIPPARCOS Data." Inertial Coordinate System on the Sky, 1990.