Miller, G. T. (1979). Living in the environment concepts, problems, and alternatives (2nd edition.). Wadsworth Publishing Company.
Dyfyniad Arddull ChicagoMiller, George Tyler. Living in the Environment Concepts, Problems, and Alternatives. 2nd edition. Belmont, Calif: Wadsworth Publishing Company, 1979.
Dyfyniad MLAMiller, George Tyler. Living in the Environment Concepts, Problems, and Alternatives. 2nd edition. Wadsworth Publishing Company, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.