Belson, W. A. (1986). Validity in survey research: With special reference to the techniques of intensive interviewing and progressive modification for testing and constructing difficult or sensitive measures for use in survey research : a report. Gower.
Cita Chicago Style (17a ed.)Belson, William A. Validity in Survey Research: With Special Reference to the Techniques of Intensive Interviewing and Progressive Modification for Testing and Constructing Difficult or Sensitive Measures for Use in Survey Research : A Report. Aldershot, Hants: Gower, 1986.
Cita MLA (9a ed.)Belson, William A. Validity in Survey Research: With Special Reference to the Techniques of Intensive Interviewing and Progressive Modification for Testing and Constructing Difficult or Sensitive Measures for Use in Survey Research : A Report. Gower, 1986.