Yonatan, K., Yusnita, A. and Azahari, A. 2025. Development of the Mr. Klin Laundry Website Using the Waterfall Method for Service Optimization. Sebatik. 29, 2 (Dec. 2025), 309–315. DOI:https://doi.org/10.46984/sebatik.v29i2.2708.