APA (7th ed.) Citation

Mather, T., Pyle, D., & Allen, A. (2004). Volcanic source for fixed nitrogen in the early Earth's atmosphere.

Chicago Style (17th ed.) Citation

Mather, T., D. Pyle, and A. Allen. Volcanic Source for Fixed Nitrogen in the Early Earth's Atmosphere. 2004.

MLA (9th ed.) Citation

Mather, T., et al. Volcanic Source for Fixed Nitrogen in the Early Earth's Atmosphere. 2004.