APA استشهاد

Johansen, B. E. (2007). Global warming in the 21st century. Atlantic publishers.

استشهاد بنمط شيكاغو

Johansen, Bruce E. Global Warming in the 21st Century. New Delhi: Atlantic publishers, 2007.

MLA استشهاد

Johansen, Bruce E. Global Warming in the 21st Century. Atlantic publishers, 2007.