Johnston. (2013). The Guide to Greening Cities (1.). Island Press/Center for Resource Economics.
Cita Chicago (17th ed.)Johnston. The Guide to Greening Cities. 1. Island Press/Center for Resource Economics, 2013.
Cita MLA (8th ed.)Johnston. The Guide to Greening Cities. 1. Island Press/Center for Resource Economics, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.