Wagenhals, G. (1985). Econometric copper market models. Quarterly review / Intergovernmental Council of Copper Exporting Countries.
Chicago-Zitierstil (17. Ausg.)Wagenhals, Gerhard. "Econometric Copper Market Models." Quarterly Review / Intergovernmental Council of Copper Exporting Countries 1985.
MLA-Zitierstil (9. Ausg.)Wagenhals, Gerhard. "Econometric Copper Market Models." Quarterly Review / Intergovernmental Council of Copper Exporting Countries, 1985.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.