Visser, W. A. (2009). Landmarks for sustainability: Events and initiatives that have changed our world.
Styl ChicagoVisser, Wayne; Author. Landmarks for Sustainability: Events and Initiatives That Have Changed Our World. Sheffield, Greenleaf Publishing, 2009.
Citace podle MLAVisser, Wayne; Author. Landmarks for Sustainability: Events and Initiatives That Have Changed Our World. 2009.
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