Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Decker, Robert. Volcanoes. 4th ed. New York: Freeman, 2006.

Cita MLA (9th ed.)

Decker, Robert. Volcanoes. 4th ed. Freeman, 2006.