APA (7th ed.) Citation

Binney, J., Gerhard, O., & Silk, J. (2001). The dark matter problem in disc galaxies.

Chicago Style (17th ed.) Citation

Binney, J., O. Gerhard, and J. Silk. The Dark Matter Problem in Disc Galaxies. 2001.

MLA (9th ed.) Citation

Binney, J., et al. The Dark Matter Problem in Disc Galaxies. 2001.