APA (7th ed.) Citation

Geological Society of London, Gibbons, W., & Moreno, T. (2002). The geology of Spain. Geological Society.

Chicago Style (17th ed.) Citation

Geological Society of London, Wes Gibbons, and Teresa Moreno. The Geology of Spain. London: Geological Society, 2002.

MLA (9th ed.) Citation

Geological Society of London, et al. The Geology of Spain. Geological Society, 2002.