Dyfyniad APA

Firor, J. (1990). Changing atmosphere: : a global challege. Yale University press.

Dyfyniad Arddull Chicago

Firor, John. Changing Atmosphere: : A Global Challege. London: Yale University press, 1990.

Dyfyniad MLA

Firor, John. Changing Atmosphere: : A Global Challege. Yale University press, 1990.

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