Groves, R. M., Fowler, F. J., Couper, M. P., Lepkowski, J. M., Singer, E., & Tourangeau, R. (2009). Survey methodology (2a. ed.). John Wiley and Sons.

Groves, Robert M., Floyd J. Fowler, Mick P. Couper, James M. Lepkowski, Eleanor Singer, and Roger Tourangeau. Survey Methodology. 2a. ed. John Wiley and Sons, 2009.

Groves, Robert M., et al. Survey Methodology. 2a. ed. John Wiley and Sons, 2009.