Gaya APA
Frey, H., Yaneske, P. (2007).
Vision of Sustainability: cities and regions .
Hoboken, NJ:
Taylor & Francis Inc..
Gaya MLA
Frey, Hildebrand., Yaneske, Paul.
"Vision of Sustainability: cities and regions".
Hoboken, NJ:
Taylor & Francis Inc.,
2007.
Text.