Schuman, H., & Scott, J. (1987). Problems in the use of survey questions to measure public opinion.
Cita Chicago (17th ed.)Schuman, Howard, i Jacqueline Scott. Problems in the Use of Survey Questions to Measure Public Opinion. 1987.
Cita MLA (9th ed.)Schuman, Howard, i Jacqueline Scott. Problems in the Use of Survey Questions to Measure Public Opinion. 1987.
Atenció: Aquestes cites poden no estar 100% correctes.