APA引文

Wittgren, H. (1988). Removal of wastewater nitrogen in a wetland filter. Universitetet i Linköping.

Chicago Style (17th ed.) Citation

Wittgren, Hans-Bertil. Removal of Wastewater Nitrogen in a Wetland Filter. Linköping, Sweden: Universitetet i Linköping, 1988.

MLA引文

Wittgren, Hans-Bertil. Removal of Wastewater Nitrogen in a Wetland Filter. Universitetet i Linköping, 1988.

警告：这些引文格式不一定是100％准确.