ALTURKI, Reem Ali. The Effect of Coordination Between Administrative Units on The Effectiveness of Purchasing – Research and Empirical Study on The Employees of Commercial Companies - Unaizah, Saudi Arabia –. Journal of Economic, Administrative and Legal Sciences, New Mexico, United States, v. 4, n. 15, p. 164–150, 2020. DOI: 10.26389/AJSRP.R280520. Disponível em: https://www.ajsrp.ojsexpert.com/index.php/jeals/article/view/3135. Acesso em: 20 dec. 2025.