Johansen, B. E. (2007). Global warming in the 21st century. Atlantic publishers.
Chicago Style aipamenaJohansen, Bruce E. Global Warming in the 21st Century. New Delhi: Atlantic publishers, 2007.
MLA aipamenaJohansen, Bruce E. Global Warming in the 21st Century. Atlantic publishers, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.