APA (7th ed.) Citation

Wielen, R. (1997). Principles of statistical astrometry. Astronomy and astrophysics, 325(?), .

Chicago Style (17th ed.) Citation

Wielen, Roland. "Principles of Statistical Astrometry." Astronomy and Astrophysics 325, no. ? (1997).

MLA (9th ed.) Citation

Wielen, Roland. "Principles of Statistical Astrometry." Astronomy and Astrophysics, vol. 325, no. ?, 1997.

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