Электронный ресурс (аналит. описание)

Klochko, V.
Ways to improve the sales promotion system [Электронный ресурс] / V. Klochko // Science and practice, actual problems, innovations November 09 – 12, 2021, Amsterdam, Netherlands : abstracts of VIII Inter. sci. and practical conf. / International science group; ed. board: E. Pluzhnik [et al.]. – Електрон. кн. – Amsterdam : [s. n.], 2021. – C. 200-202.