Groves, Robert M.; Fowler, Floyd J.; Couper, Mick P.; Lepkowski, James M.; Singer, Eleanor; Tourangeau, Roger (2004). „An introduction to survey methodology”. Survey Methodology. Wiley Series in Survey Methodology. 561 (2 изд.). Hoboken, New Jersey: John Wiley & Sons (објављено 2009). стр. 3. ISBN9780470465462. Приступљено 27. 8. 2020. „[...] survey methodology is the study of survey methods. It is the study of sources of error in surveys and how to make the numbers produced by the surveys as accurate as possible.”CS1 одржавање: Формат датума (веза)