Cita APA (7a ed.)

Decker, R., & Decker, B. (2006). Volcanoes (4th ed.). Freeman.

Cita Chicago Style (17a ed.)

Decker, Robert, y Barbara.a Decker. Volcanoes. 4th ed. New ork: Freeman, 2006.

Cita MLA (8a ed.)

Decker, Robert, y Barbara.a Decker. Volcanoes. 4th ed. Freeman, 2006.