World Health Organization. (2003). WHO guidelines on good agriculture and collection practices( GACP) for medical plants. World Health Organization.
Chicago-viite (17. p.)World Health Organization. WHO Guidelines on Good Agriculture and Collection Practices( GACP) for Medical Plants. Geneva: World Health Organization, 2003.
MLA-viite (8. p.)World Health Organization. WHO Guidelines on Good Agriculture and Collection Practices( GACP) for Medical Plants. World Health Organization, 2003.
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