PRESTHUS, R. (1975). Public Administration Robert Presthus. The Ronald Press.
Lua i Stíl Chicago (17ú heag.)PRESTHUS, Robert. Public Administration Robert Presthus. The Ronald Press, 1975.
Lua MLA (8ú heag.)PRESTHUS, Robert. Public Administration Robert Presthus. The Ronald Press, 1975.
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