Russell, G. H., Nolan, M. L., & Soare, T. F. Understanding volcanoes.
Chicago Style (17th ed.) CitationRussell, George H., Mary Lee Nolan, and Thomas F. Soare. Understanding Volcanoes.
MLA (8th ed.) CitationRussell, George H., et al. Understanding Volcanoes.
Warning: These citations may not always be 100% accurate.