North Sea Task Force. (1993). North sea quality status report 1993. Olsen and Olsen.
Citación estilo ChicagoNorth Sea Task Force. North Sea Quality Status Report 1993. Fredensborg: Olsen and Olsen, 1993.
Cita MLANorth Sea Task Force. North Sea Quality Status Report 1993. Olsen and Olsen, 1993.
Warning: These citations may not always be 100% accurate.