Dyfyniad APA

World Health Organization & World Health Organization. (1998). Regulatory Situation of Herbal Medicines. World Health organization.

Dyfyniad Arddull Chicago

World Health Organization and World Health Organization. Regulatory Situation of Herbal Medicines. Geneva: World Health organization, 1998.

Dyfyniad MLA

World Health Organization and World Health Organization. Regulatory Situation of Herbal Medicines. World Health organization, 1998.

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