APA (7th ed.) Citation

Halloran, P., Halloran, P. R., & Rickaby, R. (2008). Rapid changes in the global carbon cycle.

Chicago Style (17th ed.) Citation

Halloran, P., Paul Richard Halloran, and R. Rickaby. Rapid Changes in the Global Carbon Cycle. 2008.

MLA (9th ed.) Citation

Halloran, P., et al. Rapid Changes in the Global Carbon Cycle. 2008.