Riggs, F. W. (1959). The social sciences and public administration. Philippine Journal of Public Administration.
Lua i Stíl Chicago (17ú heag.)Riggs, Fred W. "The Social Sciences and Public Administration." Philippine Journal of Public Administration 1959.
Lua MLA (9ú heag.)Riggs, Fred W. "The Social Sciences and Public Administration." Philippine Journal of Public Administration, 1959.
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