KrosnickJ.A., & FabrigarL.R. (1997) Designing rating scales for effective measurement in surveys, in LybergL., CollinsL., DeckerM., DeleeuwE., DippoC., SchwarzN., & TrewingD. (eds) Survey Measurement and Process Quality.New York: Wiley-Interscience, pp. 141–164.
2.
SarisWE., RevillaM., KrosnickJ.A., & ShaefferE.M. (2010) Comparing questions with agree/disagree response options to questions with item-specific response options.Survey Research Methods, 4, 1, pp. 61–79.