APA (7th ed.) Citation

Warren, S. J., Hewett, P. C., Irwin, M. J., McMahon, R. G., Bridgeland, M. T., Bunclark, P. S., & Kibblewhite, E. J. (1987). First observation of a quasar with a redshift of 4. Nature Publishing Group.

Chicago Style (17th ed.) Citation

Warren, S. J., P. C. Hewett, M. J. Irwin, R. G. McMahon, M. T. Bridgeland, P. S. Bunclark, and E. J. Kibblewhite. First Observation of a Quasar with a Redshift of 4. [s.l.]: Nature Publishing Group, 1987.

MLA (9th ed.) Citation

Warren, S. J., et al. First Observation of a Quasar with a Redshift of 4. Nature Publishing Group, 1987.