Kurniasih, Fransiska Novi, et al. “Income Diversification Through Optimization of Service Rates at Universi-Tas Negeri Semarang”. International Journal of Multidisciplinary: Applied Business and Education Research, vol. 4, no. 11, Dec. 2023, pp. 4152-9, https://doi.org/10.11594/ijmaber.04.11.32.