GOHAGAN, J. K. (1980). Quantitative Analysis For Public Policy John Kenneth Gohagan. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)GOHAGAN, John Kenneth. Quantitative Analysis For Public Policy John Kenneth Gohagan. McGraw-Hill, 1980.
Lua MLA (8ú heag.)GOHAGAN, John Kenneth. Quantitative Analysis For Public Policy John Kenneth Gohagan. McGraw-Hill, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.