@inbook{Graham2003,
author = {Graham, J.W. and Cumsille, P.E. and Elek-Fisk, E.},
title= {Methods for handling missing data},
year = {2003},
editor = {Schinka, J.A.},
editor = {Velicer, W.F.},
booktitle = {Research Methods in Psychology. Volume 2 of Handbook of Psychology},
address = {New York},
publisher = {John Wiley & Sons},
pages = {87--114},
}