CONVERSE, Jean M. Survey questions : handcrafting the standardized questionnaire - 2ª ed. - London [etc.] SAGE Publications 1986 - 80 - (SAGE University Papers. Quantitative Applications in the Social Sciences; 63) . ISBN: 0803927433 Index Terms--Genre/Form: Ciències socialsMETODOLOGÍAMÉTODOS ESTADÍSTICOS Universal Decimal Class. No.: 311