Dyfyniad APA

Gribbin, J. (1990). Hothouse earth: The greenhouse effect and gaia (First American edition.). Black Swan.

Dyfyniad Arddull Chicago

Gribbin, John. Hothouse Earth: The Greenhouse Effect and Gaia. First American edition. London: Black Swan, 1990.

Dyfyniad MLA

Gribbin, John. Hothouse Earth: The Greenhouse Effect and Gaia. First American edition. Black Swan, 1990.

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