@misc{Williams_Colin_C._Cash-in-hand_2004,
 author={Williams, Colin C.},
 address={New York},
 howpublished={online},
 year={2004},
 publisher={Palgrave},
 title={Cash-in-hand work : the underground sector and the hidden economy of favours},
 keywords={gospodarka ukryta, zatrudnienie nielegalne},
}