APA ציטוט

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

Chicago Style (17th ed.) Citation

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

ציטוט MLA

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