National Association of Broadcasters. Legal Department. (1988). Political Broadcast Catechism (12th ed.). National Association of Broadcasters.
Chicago-viite (17. p.)National Association of Broadcasters. Legal Department. Political Broadcast Catechism. 12th ed. Washington, D.C: National Association of Broadcasters, 1988.
MLA-viite (9. p.)National Association of Broadcasters. Legal Department. Political Broadcast Catechism. 12th ed. National Association of Broadcasters, 1988.
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