Dyfyniad APA

Abrahamson, D. E. (1989). The Challenge of global warming. Island Press.

Dyfyniad Arddull Chicago

Abrahamson, Dean E. The Challenge of Global Warming. Washington: Island Press, 1989.

Dyfyniad MLA

Abrahamson, Dean E. The Challenge of Global Warming. Island Press, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.