Cita APA

Lehtonen, M. (1997). Criteria in environmental labelling: A comparative analysis of environmental criteria in selected labelling schemes. Geneva, Switzerland: United Nations Environment Programme.

Citación estilo Chicago

Lehtonen, Markku. Criteria in Environmental Labelling: A Comparative Analysis of Environmental Criteria in Selected Labelling Schemes. Geneva, Switzerland: United Nations Environment Programme, 1997.

Cita MLA

Lehtonen, Markku. Criteria in Environmental Labelling: A Comparative Analysis of Environmental Criteria in Selected Labelling Schemes. Geneva, Switzerland: United Nations Environment Programme, 1997.