@inbook{Singer2002,
author = {Singer, E. },
title= {The use of incentives to reduce nonresponse in household surveys},
year = {2002},
editor = {Groves, R.M.},
editor = {Dillman, D.A.},
editor = {Eltinge, J.},
editor = {Little, R.J.A. },
booktitle = {Survey nonresponse},
address = {New York},
publisher = {Wiley},
pages = {163--178},
}