Citazione Stile APA (7a Edizione)
Klepper, G., & Michaelis, P. (1991). Cadmium in West Germany: How much do we know about stocks and flows? Institut für Weltwirtschaft.
Citazione stile Chigago Style (17a edizione)
Klepper, Gernot, e Peter Michaelis. Cadmium in West Germany: How Much Do We Know About Stocks and Flows? Kiel: Institut für Weltwirtschaft, 1991.
Citatione MLA (9a ed.)
Klepper, Gernot, e Peter Michaelis. Cadmium in West Germany: How Much Do We Know About Stocks and Flows? Institut für Weltwirtschaft, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.