GOHAGAN, J. K. (1980). Quantitative Analysis For Public Policy John Kenneth Gohagan. McGraw-Hill.
Dyfyniad Arddull ChicagoGOHAGAN, John Kenneth. Quantitative Analysis For Public Policy John Kenneth Gohagan. McGraw-Hill, 1980.
Dyfyniad MLAGOHAGAN, John Kenneth. Quantitative Analysis For Public Policy John Kenneth Gohagan. McGraw-Hill, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.