APA

Watt F., . (1994). Earthquakes And Volcanoes. London: Usborne.

Chicago

Watt Fiona, . 1994. Earthquakes And Volcanoes. London: Usborne.

Harvard

Watt F., . (1994). Earthquakes And Volcanoes. London: Usborne.

MLA

Watt Fiona, . Earthquakes And Volcanoes. London: Usborne. 1994.