World Health Organization. (1989). WORLD health organization: : publications catalogue 1948- 1989. World Health Organization.
Chicago-viite (17. p.)World Health Organization. WORLD Health Organization: : Publications Catalogue 1948- 1989. World Health Organization, 1989.
MLA-viite (9. p.)World Health Organization. WORLD Health Organization: : Publications Catalogue 1948- 1989. World Health Organization, 1989.
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