Chaffey, D. (2016). Digital marketing strategy, implementation and practice 6th ed. Pearson.
Lua i Stíl Chicago (17ú heag.)Chaffey, Dave. Digital Marketing Strategy, Implementation and Practice 6th Ed. Pearson, 2016.
Lua MLA (8ú heag.)Chaffey, Dave. Digital Marketing Strategy, Implementation and Practice 6th Ed. Pearson, 2016.
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