APA

Grabi H., Kokott J. & Kulessa M. (2002). Charging the Use of Global Commons. Berlín: German Advisory Council on Global Change-(WBGU).

Chicago

Grabi Harmut, Kokott Juliane and Kulessa Margareta. 2002. Charging the Use of Global Commons. Berlín: German Advisory Council on Global Change-(WBGU).

Harvard

Grabi H., Kokott J. and Kulessa M. (2002). Charging the Use of Global Commons. Berlín: German Advisory Council on Global Change-(WBGU).

MLA

Grabi Harmut, Kokott Juliane and Kulessa Margareta. Charging the Use of Global Commons. Berlín: German Advisory Council on Global Change-(WBGU). 2002.