APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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