1. Baker, R., Brick, J. M., Bates, N. A., Battaglia, M., Couper, M. P., Dever, J. A., . . . Tourangeau, R. (2013). Summary report of the AAPOR Task Force on Non-probability Sampling. Journal of Survey Statistics and Methodology, 1, 90–143. doi: 10.1093/jssam/smt008
2. Bergeson, S. C., Gray, J., Ehrmantraut, L. A., & Hays, R. D. (2013). Comparing Web-based with mail survey administration of the Consumer Assessment of Healthcare Providers and Systems (CAHPS®) Clinician and Group Survey. Primary Health Care, 3(1), 132. doi: 10.4172/2167-1079.1000132
3. Bethlehem, J. (2002). Weighting nonresponse adjustments based on auxiliary information. In R. Groves, D. Dillman, R. Eltinge, & L. Little (Eds.), Survey nonresponse (pp. 275–288). New York: Wiley.
4. Chang, L., & Krosnick, J. A. (2009). National surveys via RDD telephone interviewing versus the Internet: Comparing sample representativeness and response quality. Public Opinion Quarterly, 73, 641–678. doi: 10.1093/poq/nfp075
5. Craig, B. M., Hays, R. D., Pickard, A. S., Cella, D., Revicki, D. A., & Reeve, B. B. (2013). Comparison of US panel vendors for online surveys. Journal of Medical Internet Research, 15, e260. doi: 10.2196/jmir.2903