Krowinska, A., & Backhaus, C. (2023). Digital content marketing: Creating value in practice (First Edition.). United Notion.
Lua i Stíl Chicago (17ú heag.)Krowinska, Agata, agus Christof Backhaus. Digital Content Marketing: Creating Value in Practice. First Edition. New york: United Notion, 2023.
Lua MLA (9ú heag.)Krowinska, Agata, agus Christof Backhaus. Digital Content Marketing: Creating Value in Practice. First Edition. United Notion, 2023.
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