Campbell, J. E. a. G. (2000). Before the vote: Forecasting American national elections. SAGE Publications, Inc..
Citazione stile Chigago Style (17a edizione)Campbell, James E. and Garand. Before the Vote: Forecasting American National Elections. Thousand Oaks, California: SAGE Publications, Inc., 2000.
Citatione MLA (9a ed.)Campbell, James E. and Garand. Before the Vote: Forecasting American National Elections. SAGE Publications, Inc., 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.