APA (7th ed.) Citation

Sutton, M., Briggs, D., Siveter, D., & Siveter, D. (2011). A soft-bodied lophophorate from the Silurian of England.

Chicago Style (17th ed.) Citation

Sutton, MD, D. Briggs, D. Siveter, and D. Siveter. A Soft-bodied Lophophorate from the Silurian of England. 2011.

MLA (9th ed.) Citation

Sutton, MD, et al. A Soft-bodied Lophophorate from the Silurian of England. 2011.