Institute of Practitioners in Advertising & Butterfield, L. (1999). Excellence in advertising: The IPA guide to best practice (2nd ed.). Elsevier Butterworth-Heinemann.
Παραπομπή σε μορφή Chicago (17η εκδ.)Institute of Practitioners in Advertising και Leslie Butterfield. Excellence in Advertising: The IPA Guide to Best Practice. 2nd ed. Amsterdam: Elsevier Butterworth-Heinemann, 1999.
Παραπομπή σε μορφή MLA (9th εκδ.)Institute of Practitioners in Advertising και Leslie Butterfield. Excellence in Advertising: The IPA Guide to Best Practice. 2nd ed. Elsevier Butterworth-Heinemann, 1999.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.