Sadyk, D. and Islam, D.M. 2023. Theoretical background for social media marketing research: An example of value co-creation theory application. ECONOMIC Series of the Bulletin of the L N Gumilyov ENU. 2 (Jan. 2023), 112–127. DOI:https://doi.org/10.32523/2079-620X-2021-2-112-127.