Siffin, W. J. (1960). Thesis topics and outlines in public administration. Institute of Public Administration, Thammasat University.
Lua i Stíl Chicago (17ú heag.)Siffin, William J. Thesis Topics and Outlines in Public Administration. Bangkok: Institute of Public Administration, Thammasat University, 1960.
Lua MLA (9ú heag.)Siffin, William J. Thesis Topics and Outlines in Public Administration. Institute of Public Administration, Thammasat University, 1960.
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