Dyfyniad APA

(2011). Save the ozone layer: Every action counts. Centre for Science and Environment.

Dyfyniad Arddull Chicago

Save the Ozone Layer: Every Action Counts. New Delhi: Centre for Science and Environment, 2011.

Dyfyniad MLA

Save the Ozone Layer: Every Action Counts. Centre for Science and Environment, 2011.

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