John W Spaven. (1960). Campaigns in agricultural extension programs; N.3. Michigan: National Project in Agricultural Communication.
Style de citation ChicagoJohn W Spaven. Campaigns in Agricultural Extension Programs; N.3. Michigan: National Project in Agricultural Communication, 1960.
Style de citation MLAJohn W Spaven. Campaigns in Agricultural Extension Programs; N.3. Michigan: National Project in Agricultural Communication, 1960.
Attention : ces citations peuvent ne pas être correctes à 100%.