Παραπομπή APA

Houghton, J. (1997). Global warming: :complete briefing. University Press.

Παραπομπή Chicago Style

Houghton, John. Global Warming: :complete Briefing. Cambridge: University Press, 1997.

Παραπομπή MLA

Houghton, John. Global Warming: :complete Briefing. University Press, 1997.