U. S. Sulistyawati, Bahruni, Afrizal, and Alfina, “Billing Barber Shop (An Implementation of GoodBarber App Builder)”, Int. J. Softw. Eng. Comput. Sci., vol. 2, no. 2, pp. 46–51, Oct. 2022, doi: 10.35870/ijsecs.v2i2.798.