Hepner, H. W. (1949). Effective advertising. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Hepner, Harry Walker. Effective Advertising. New York: McGraw-Hill, 1949.
Lua MLA (9ú heag.)Hepner, Harry Walker. Effective Advertising. McGraw-Hill, 1949.
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