AMERKHANOVA A. B.; MESHKOV V. R. UNIVERSITY EDUCATIONAL SERVICES MARKETING: FEATURES, OPPORTUNITIES, PROBLEMS . «Вестник НАН РК», [S. l.], n. 6, p. 208–213., 2019. Disponível em: https://journals.nauka-nanrk.kz/bulletin-science/article/view/1223. Acesso em: 25 ноя. 2024.