Butz, E. L. (1951). Price fixing for foodstuffs. American Enterprise Association.
Lua i Stíl Chicago (17ú heag.)Butz, Earl L. Price Fixing for Foodstuffs. New York: American Enterprise Association, 1951.
Lua MLA (8ú heag.)Butz, Earl L. Price Fixing for Foodstuffs. American Enterprise Association, 1951.
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