APA (7th ed.) Citation

Decker, R. W., & Decker, B. (1989). Volcanoes (Rev. and updated ed.). W.H. Freeman.

Chicago Style (17th ed.) Citation

Decker, Robert W., and Barbara Decker. Volcanoes. Rev. and updated ed. New York: W.H. Freeman, 1989.

MLA (9th ed.) Citation

Decker, Robert W., and Barbara Decker. Volcanoes. Rev. and updated ed. W.H. Freeman, 1989.