Madsen, P., & Shafritz, J. M. (1992). Essentials of government ethics (ed.). Meridian.
Lua i Stíl Chicago (17ú heag.)Madsen, Peter, agus Jay M. Shafritz. Essentials of Government Ethics. ed. New York: Meridian, 1992.
Lua MLA (9ú heag.)Madsen, Peter, agus Jay M. Shafritz. Essentials of Government Ethics. ed. Meridian, 1992.
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