APA (7th ed.) Citation

Wielen, R. (1985). Report of IAU Commission 33: Structure and dynamics of the galactic system. Reports on astronomy, 19A, .

Chicago Style (17th ed.) Citation

Wielen, Roland. "Report of IAU Commission 33: Structure and Dynamics of the Galactic System." Reports on Astronomy 19A (1985).

MLA (9th ed.) Citation

Wielen, Roland. "Report of IAU Commission 33: Structure and Dynamics of the Galactic System." Reports on Astronomy, vol. 19A, 1985.

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