Styl cytowania APA

Williams, T. (1990). Food, environment and health: A guide for primary school teachers. W H O.

Styl cytowania Chicago

Williams, Trefor. Food, Environment and Health: A Guide for Primary School Teachers. Geneva: W H O, 1990.

Styl cytowania MLA

Williams, Trefor. Food, Environment and Health: A Guide for Primary School Teachers. W H O, 1990.