APA引文

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

Chicago Edition Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.