World Health Organization. (2009). The use of herbal medicines in primary health care. World Health Organization.
Chicago-viite (17. p.)World Health Organization. The Use of Herbal Medicines in Primary Health Care. New Delhi: World Health Organization, 2009.
MLA-viite (8. p.)World Health Organization. The Use of Herbal Medicines in Primary Health Care. World Health Organization, 2009.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.