Cita APA (7th ed.)

Waters, W. E., Heikkinen, E., & Dontas, A. S. (1989). Health, lifestyles and services for the elderly. World Health Organization, Regional Office for Europe.

Cita Chicago (17th ed.)

Waters, W. E., E. Heikkinen, i A. S. Dontas. Health, Lifestyles and Services for the Elderly. Copenhagen: World Health Organization, Regional Office for Europe, 1989.

Cita MLA (9th ed.)

Waters, W. E., et al. Health, Lifestyles and Services for the Elderly. World Health Organization, Regional Office for Europe, 1989.