APA (7th ed.) Citation

World Health Organization. Regional Office for Europe & Offerhaus, L. (1997). Drugs for the elderly (2nd ed.). World Health Organization, Regional Office for Europe.

Chicago Style (17th ed.) Citation

World Health Organization. Regional Office for Europe and L. Offerhaus. Drugs for the Elderly. 2nd ed. Copenhagen: World Health Organization, Regional Office for Europe, 1997.

MLA (8th ed.) Citation

World Health Organization. Regional Office for Europe and L. Offerhaus. Drugs for the Elderly. 2nd ed. World Health Organization, Regional Office for Europe, 1997.