Harvard university. Graduate school of public administration, Friedrich, C. J., & Mason, E. S. (1940). Public policy: A yearbook of the Graduate School of Public Administration, Harvard University, 1940-. Harvard University Press.
Lua i Stíl Chicago (17ú heag.)Harvard university. Graduate school of public administration, Carl Joachim Friedrich, agus Edward Sagendorph Mason. Public Policy: A Yearbook of the Graduate School of Public Administration, Harvard University, 1940-. Cambridge, Mass: Harvard University Press, 1940.
Lua MLA (9ú heag.)Harvard university. Graduate school of public administration, et al. Public Policy: A Yearbook of the Graduate School of Public Administration, Harvard University, 1940-. Harvard University Press, 1940.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.