APA-Zitierstil (7. Ausg.)
Portugal, P. (2007). U.S. unemployment duration: Has long become longer or short become shorter? Czech National Bank.
Chicago-Zitierstil (17. Ausg.)
Portugal, Pedro. U.S. Unemployment Duration: Has Long Become Longer or Short Become Shorter? Praha: Czech National Bank, 2007.
MLA-Zitierstil (9. Ausg.)
Portugal, Pedro. U.S. Unemployment Duration: Has Long Become Longer or Short Become Shorter? Czech National Bank, 2007.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.