APA aipamena

Wellmer,Friedrich-Wilhelm. (1989). Economic evaluations in exploration. Springer - Verlag.

Chicago Style aipamena

Wellmer,Friedrich-Wilhelm. Economic Evaluations in Exploration. London: Springer - Verlag, 1989.

MLA aipamena

Wellmer,Friedrich-Wilhelm. Economic Evaluations in Exploration. Springer - Verlag, 1989.