@inbook{Roberts2007,
author = {Roberts, K.},
title= {The changing profile of labor migration},
year = {2007},
doi = {10.1093/acprof:oso/9780199299294.003.0014},
editor = {Zhao, Z.},
editor = {Guo, F. },
booktitle = {Transition and challenge: China’s population at the beginning of the 21st century},
address = {Oxford},
publisher = {Oxford University Press},
pages = {233--250},
}