Perna. Preparing Today's Students for Tomorrow's Jobs in Metropolitan America. University of Pennsylvania Press.
Citazione stile Chigago Style (17a edizione)Perna. Preparing Today's Students for Tomorrow's Jobs in Metropolitan America. University of Pennsylvania Press.
Citatione MLA (8a ed.)Perna. Preparing Today's Students for Tomorrow's Jobs in Metropolitan America. University of Pennsylvania Press.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.