Cita APA (7th ed.)
Hjelmar, O. (2009). Treatment methods for waste to be landfilled. Nordic Council of Ministers.
Cita Chicago (17th ed.)
Hjelmar, Ole. Treatment Methods for Waste to Be Landfilled. Copenhagen: Nordic Council of Ministers, 2009.
Cita MLA (9th ed.)
Hjelmar, Ole. Treatment Methods for Waste to Be Landfilled. Nordic Council of Ministers, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.