Dyfyniad APA

(2005). Selected practice recommendations for contraceptive use (2nd ed.). World Health Organisation.

Dyfyniad Arddull Chicago

Selected Practice Recommendations for Contraceptive Use. 2nd ed. Geneva: World Health Organisation, 2005.

Dyfyniad MLA

Selected Practice Recommendations for Contraceptive Use. 2nd ed. World Health Organisation, 2005.

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