Cita APA (7th ed.)

(1997). The World's worst disasters of the twentieth century. Octopus Books.

Cita Chicago (17th ed.)

The World's Worst Disasters of the Twentieth Century. London: Octopus Books, 1997.

Cita MLA (9th ed.)

The World's Worst Disasters of the Twentieth Century. Octopus Books, 1997.