Dyfyniad APA

World Health Organization. (1998). Guidelines for the appropriate use of herbal medicines. World Health organization.

Dyfyniad Arddull Chicago

World Health Organization. Guidelines for the Appropriate Use of Herbal Medicines. Manila: World Health organization, 1998.

Dyfyniad MLA

World Health Organization. Guidelines for the Appropriate Use of Herbal Medicines. World Health organization, 1998.

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