Butterfield, L. (1999). Excellence in advertising: The IPA guide to best practice (2nd ed.). Butterworth Heinemann.
Lua i Stíl Chicago (17ú heag.)Butterfield, Leslie. Excellence in Advertising: The IPA Guide to Best Practice. 2nd ed. Oxford: Butterworth Heinemann, 1999.
Lua MLA (9ú heag.)Butterfield, Leslie. Excellence in Advertising: The IPA Guide to Best Practice. 2nd ed. Butterworth Heinemann, 1999.
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