↑Vehovar, V.; Lozar Manfreda, K. (2008). "Overview: Online Surveys". In Fielding, N.; Lee, R. M.; Blank, G. (eds.).The SAGE Handbook of Online Research Methods. London: SAGE. pp. 177-194.
↑Revilla, Melanie A. (30 December 2012). "Measurement invariance and quality of composite scores in a face-to-face and a web survey".Survey Research Methods. 7 (1): 17-28.
↑Andrade, C. (2020). The limitations of online surveys.Indian journal of psychological medicine, 42(6), 575-576.
