Ashby, E., & Anderson, M. (1981). The politics of clean air. Clarendon Press ; Oxford University Press.
Dyfyniad Arddull ChicagoAshby, Eric, and Mary Anderson. The Politics of Clean Air. Oxford : New York: Clarendon Press ; Oxford University Press, 1981.
Dyfyniad MLAAshby, Eric, and Mary Anderson. The Politics of Clean Air. Clarendon Press ; Oxford University Press, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.