Wibisono, C. and Mujizat, I. 2018. Efficiency as Mediator between Artifacts, Values and Cultural Organization Assumptions Employees Working On Effectiveness of Parliament Secretariat (Dprd) Riau Islands Provincial, Indonesia. International Journal of Engineering & Technology. 7, 4.28 (Nov. 2018), 217–224. DOI:https://doi.org/10.14419/ijet.v7i4.28.22582.