Cita APA

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

Citación estilo Chicago

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

Cita MLA

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