Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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

Precaución: Estas citas no son 100% exactas.