APA (7th ed.) Citation

Oppenheimer, C., Pyle, D. M., & Barclay, J. (2003). Volcanic degassing. Geological Society.

Chicago Style (17th ed.) Citation

Oppenheimer, Clive, D. M. Pyle, and J. Barclay. Volcanic Degassing. London: Geological Society, 2003.

MLA (9th ed.) Citation

Oppenheimer, Clive, et al. Volcanic Degassing. Geological Society, 2003.