Cita APA (7a ed.)

Williams, T., Moon, A., & Williams, M. (1990). Food, environment and health: A guide for primary school teachers. World Health Organization.

Cita Chicago Style (17a ed.)

Williams, Trefor, Alysuon Moon, y Margaret Williams. Food, Environment and Health: A Guide for Primary School Teachers. Geneva: World Health Organization, 1990.

Cita MLA (9a ed.)

Williams, Trefor, et al. Food, Environment and Health: A Guide for Primary School Teachers. World Health Organization, 1990.