Dwikesumasari, Phima Ruthia, and Rachmatullah Dwi Nugraha. 2019. “Event Sponsorship Service Quality at PT Sinar Sosro East Java Region: A Gap Analysis”. TIJAB (The International Journal of Applied Business) 3 (2):73-86. https://doi.org/10.20473/tijab.V3.I2.2019.73-86.