Gehl, J., & Svarre, B. (2013). How to Study Public Life. Island Press.
Dyfyniad Arddull ChicagoGehl, Jan, and Birgitte Svarre. How to Study Public Life. Washington, DC: Island Press, 2013.
Dyfyniad MLAGehl, Jan, and Birgitte Svarre. How to Study Public Life. Island Press, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.