Style de citation APA (7e éd.)

Verschuur, G. L. (1996). Impact!: The threat of comets and asteroids. Oxford University Press.

Style de citation Chicago (17e éd.)

Verschuur, Gerrit L. Impact!: The Threat of Comets and Asteroids. New York: Oxford University Press, 1996.

Style de citation MLA (9e éd.)

Verschuur, Gerrit L. Impact!: The Threat of Comets and Asteroids. Oxford University Press, 1996.