Cita APA (7a ed.)

Russell, G. H., Nolan, M. L., & Soare, T. F. Understanding volcanoes.

Cita Chicago Style (17a ed.)

Russell, George H., Mary Lee Nolan, y Thomas F. Soare. Understanding Volcanoes.

Cita MLA (8a ed.)

Russell, George H., et al. Understanding Volcanoes.