1. Alalawan, A., Rana, N., Dwivedi, Y., Algharabat, R.: Social media in marketing: A review and analysis of the existing literature. Science Direct. 34, 1177–1190 (2017)
2. Schwemmer, C., Ziewiecki, S.: Social Media Sellout: The Increasing Role of Product Promotion on YouTube, pp. 1–20 (2018)
3. Hoffman, L.D., και Fodor, M.: Can You Measure the ROI of Your Social MediaMarketing? pp. 41–49. MIT SLOAN Management Review (2010)
4. Johan Wigmo, J.: Social Media Marketing. Which Role Can Social Media Play as a Marketing Tool? Bachelor Thesis (2010)
5. Palmer, Α., Koenig-Lewis, Ν.: An experiential, social network-based approach to direct marketing. Emerald Group Publishing Limited (2009)