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2. https://www.investopedia.com/terms/m/multi-level-marketing.asp
3. https://www.leadmlmsoftware.com/countries-most-mlm-distributors/#COUNTRIES WITH_ MOST_ MLM_DISTRIBUTORS
4. Attri, R. (2011). A study of consumer perceptions of the Products sold through multilevel marketing. Prabandhan & Taqniki, Management Research Journal, 5(4), 97-103.
5. https://ag.ny.gov/consumer-frauds/pyramid-schemes