Cita APA (7th ed.)

Decker, R. W., & Decker, B. (1989). Volcanoes (Revised and updated edition.). W.H. Freeman.

Cita Chicago (17th ed.)

Decker, Robert W., i Barbara Decker. Volcanoes. Revised and updated edition. New York: W.H. Freeman, 1989.

Cita MLA (9th ed.)

Decker, Robert W., i Barbara Decker. Volcanoes. Revised and updated edition. W.H. Freeman, 1989.