Cita APA (7th ed.)

Bolt, B. A. (1999). Earthquakes (4a. ed.). W. H. Freeman.

Cita Chicago (17th ed.)

Bolt, Bruce A. Earthquakes. 4a. ed. Nueva York: W. H. Freeman, 1999.

Cita MLA (9th ed.)

Bolt, Bruce A. Earthquakes. 4a. ed. W. H. Freeman, 1999.