Bradfield, D. J. (1966). Guide to extension training. Food and Agriculture Organization of the United Nations.
Citazione stile Chigago Style (17a edizione)Bradfield, D. J. Guide to Extension Training. Rome: Food and Agriculture Organization of the United Nations, 1966.
Citatione MLA (8a ed.)Bradfield, D. J. Guide to Extension Training. Food and Agriculture Organization of the United Nations, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.