KUNANBAYEVA, D. A. Issues of the marketing mix’s formation and its relationship with competitive strategy’s development for educational services . Journal of Economic Research & Business Administration, [S. l.], v. 105, n. 5, p. 65–73, 2015. Disponível em: https://be.kaznu.kz/index.php/math/article/view/470. Acesso em: 1 sep. 2024.