Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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