Nagel, S. S., & Mills, M. K. (1993). Professional developments in policy studies. Greenwood Press.
Lua i Stíl Chicago (17ú heag.)Nagel, Stuart S., agus Miriam K. Mills. Professional Developments in Policy Studies. Westport, Conn: Greenwood Press, 1993.
Lua MLA (9ú heag.)Nagel, Stuart S., agus Miriam K. Mills. Professional Developments in Policy Studies. Greenwood Press, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.