APA
Helles F., Holten-Andersen P. & Wichmann L. (2001). Multiple use of forests and other natural resources. Dordrecht: Kluwer Academic.
Chicago
Helles Finn, Holten-Andersen Per and Wichmann Lars. 2001. Multiple use of forests and other natural resources. Dordrecht: Kluwer Academic.
Harvard
Helles F., Holten-Andersen P. and Wichmann L. (2001). Multiple use of forests and other natural resources. Dordrecht: Kluwer Academic.
MLA
Helles Finn, Holten-Andersen Per and Wichmann Lars. Multiple use of forests and other natural resources. Dordrecht: Kluwer Academic. 2001.