Dyfyniad APA
Christian, S. (1997). Shake, rattle, and roll.: The world's most amazing volcanoes, earthquakes, and other forces. John Wiley & Sons.
Dyfyniad Arddull Chicago
Christian, Spencer. Shake, Rattle, and Roll.: The World's Most Amazing Volcanoes, Earthquakes, and Other Forces. New York: John Wiley & Sons, 1997.
Dyfyniad MLA
Christian, Spencer. Shake, Rattle, and Roll.: The World's Most Amazing Volcanoes, Earthquakes, and Other Forces. John Wiley & Sons, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.