Dyfyniad APA

(1999). Compendium of environment statistics 1999. Central Statistical Organisation.

Dyfyniad Arddull Chicago

Compendium of Environment Statistics 1999. New Delhi: Central Statistical Organisation, 1999.

Dyfyniad MLA

Compendium of Environment Statistics 1999. Central Statistical Organisation, 1999.

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