APA (7th ed.) Citation

Decker, R. W., & Decker, B. (1981). Volcanoes. W.H. Freeman.

Chicago Style (17th ed.) Citation

Decker, Robert W., and Barbara Decker. Volcanoes. San Francisco: W.H. Freeman, 1981.

MLA (9th ed.) Citation

Decker, Robert W., and Barbara Decker. Volcanoes. W.H. Freeman, 1981.