@article{550, 
year={1996},
issn={1972-5205},
journal={RISORSA UOMO },
number={2},
volume={},
doi={},
title={Motivation reconsidered: the concept of competence},
abstract={}
url={http://www.francoangeli.it/Riviste/Scheda_rivista.aspx?idArticolo=550},
author={R. W. White}
pages={},
language={EN}}