@techreport{Bell2009,
author = {Bell, M. and Muhidin, S.},
title= {Cross-national comparisons of internal migration},
year = {2009},
URL = {http://hdr.undp.org/sites/default/files/hdrp_2009_30.pdf},
publisher = {United Nations Development Programme},
address = {New York},
institution = {Human Development Reports, Research Paper 2009/30},
}