Gaya APA

Northcott, M, S. (2007). A moral climate: The ethics of global warming. Foreword by John Houghton. . London: London Darton.

Gaya MLA

Northcott, Michael, S.. "A moral climate: The ethics of global warming. Foreword by John Houghton. ". London: London Darton, 2007. Buku.