Dyfyniad APA

WHO. (1991). Environmental health criteria; N.126: Partially halogenated chlorofluorocarbons ( methane derivatives ). Geneva: WHO.

Dyfyniad Arddull Chicago

WHO. Environmental Health Criteria; N.126: Partially Halogenated Chlorofluorocarbons ( Methane Derivatives ). Geneva: WHO, 1991.

Dyfyniad MLA

WHO. Environmental Health Criteria; N.126: Partially Halogenated Chlorofluorocarbons ( Methane Derivatives ). Geneva: WHO, 1991.

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