Cita APA (7a ed.)

Weisman, A. (2013). Countdown: Our Last, Best Hope for a future on earth? Little Brown.

Cita Chicago Style (17a ed.)

Weisman, Alan. Countdown: Our Last, Best Hope for a Future on Earth? London: Little Brown, 2013.

Cita MLA (9a ed.)

Weisman, Alan. Countdown: Our Last, Best Hope for a Future on Earth? Little Brown, 2013.