Bolt, B. A. (1999). Earthquakes (4.). W.H Freeman.
Chicago Style aipamenaBolt, Bruce A. Earthquakes. 4. NY: W.H Freeman, 1999.
MLA aipamenaBolt, Bruce A. Earthquakes. 4. W.H Freeman, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
Bolt, B. A. (1999). Earthquakes (4.). W.H Freeman.
Chicago Style aipamenaBolt, Bruce A. Earthquakes. 4. NY: W.H Freeman, 1999.
MLA aipamenaBolt, Bruce A. Earthquakes. 4. W.H Freeman, 1999.