Bruno S. Frey, Friedrich Schneider,
"Informal and Underground Economy"
, in Ashenfelter, Orley: International Encyclopedia of Social and Behavioral Science, Vol. 12, Elsevier Science Publishing Company, Amsterdam, 2001
Original Titel:
Informal and Underground Economy
Sprache des Titels:
Englisch
Original Buchtitel:
International Encyclopedia of Social and Behavioral Science