APA aipamena

Eichhorn, W. (1982). Economic theory of natural resources. Physica-Verlag.

Chicago Style aipamena

Eichhorn, W. Economic Theory of Natural Resources. Wurzburg: Physica-Verlag, 1982.

MLA aipamena

Eichhorn, W. Economic Theory of Natural Resources. Physica-Verlag, 1982.