APA (7th ed.) Citation

Bettwieser, E., Fricke, K. J., & Spurzem, R. (1985). Why are stellar systems anisotropic? Dynamics of star clusters.

Chicago Style (17th ed.) Citation

Bettwieser, Erich, Klaus J. Fricke, and Rainer Spurzem. "Why Are Stellar Systems Anisotropic?" Dynamics of Star Clusters 1985.

MLA (9th ed.) Citation

Bettwieser, Erich, et al. "Why Are Stellar Systems Anisotropic?" Dynamics of Star Clusters, 1985.