Cita APA (7th ed.)

North Sea Task Force. (1993). North sea quality status report 1993. Olsen and Olsen.

Cita Chicago (17th ed.)

North Sea Task Force. North Sea Quality Status Report 1993. Fredensborg: Olsen and Olsen, 1993.

Cita MLA (9th ed.)

North Sea Task Force. North Sea Quality Status Report 1993. Olsen and Olsen, 1993.