Cita APA

Bradfield, D. J., & Bradfield, D. J. (1966). Guide to extension training. Rome: Food and Agriculture Organization of the United Nations International Society f.

Citación estilo Chicago

Bradfield, D. J., y D. J. Bradfield. Guide to Extension Training. Rome: Food and Agriculture Organization of the United Nations International Society f, 1966.

Cita MLA

Bradfield, D. J., y D. J. Bradfield. Guide to Extension Training. Rome: Food and Agriculture Organization of the United Nations International Society f, 1966.