APA (7th ed.) Citation

Decker, R. W., & Decker, B. (1989). Volcanoes (2., rev. and updated ed.). Freeman.

Chicago Style (17th ed.) Citation

Decker, Robert Wayne, and Barbara Decker. Volcanoes. 2., rev. and updated ed. New York u.a: Freeman, 1989.

MLA (9th ed.) Citation

Decker, Robert Wayne, and Barbara Decker. Volcanoes. 2., rev. and updated ed. Freeman, 1989.