Rosha, Z., & ., . (2018). The Effect of Implementation of Service Marketing Mix to the Process of Tourist Decision to Visit Tourism Object: A Case Study at Lembah Harau, Lima Puluh Kota Regency, Sumatera Barat Province, Indonesia. International Journal of Engineering & Technology, 7(4.9), 112-117. https://doi.org/10.14419/ijet.v7i4.9.20630