Portney, K. E. (1986). Approaching public policy analysis: An introduction to policy and program research. Prentice-Hall.
Chicago-referens (17:e uppl.)Portney, Kent E. Approaching Public Policy Analysis: An Introduction to Policy and Program Research. Englewood Cliffs, N.J: Prentice-Hall, 1986.
MLA-referens (9:e uppl.)Portney, Kent E. Approaching Public Policy Analysis: An Introduction to Policy and Program Research. Prentice-Hall, 1986.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.