Clavel, M. (1986). Environmental aspects of transportation in cities: Basic guidelines for an environmentally sound transportation system in urban areas. Industry and Environment Office, United Nations Environment Programme.
Citace podle Chicago (17th ed.)Clavel, Maurice. Environmental Aspects of Transportation in Cities: Basic Guidelines for an Environmentally Sound Transportation System in Urban Areas. [Paris, France?]: Industry and Environment Office, United Nations Environment Programme, 1986.
Citace podle MLA (8th ed.)Clavel, Maurice. Environmental Aspects of Transportation in Cities: Basic Guidelines for an Environmentally Sound Transportation System in Urban Areas. Industry and Environment Office, United Nations Environment Programme, 1986.
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