Portugal, R. C. (1961). Politics - pastime or serious business. Philippine Journal of Public Administration.
Lua i Stíl Chicago (17ú heag.)Portugal, Ramon C. "Politics - Pastime or Serious Business." Philippine Journal of Public Administration 1961.
Lua MLA (9ú heag.)Portugal, Ramon C. "Politics - Pastime or Serious Business." Philippine Journal of Public Administration, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.