Sa’adillah Maylawati, Dian, et al. “Tracing the Linkage of Several Unified Modelling Language Diagrams in Software Modelling Based on Best Practices”. International Journal of Engineering and Technology, vol. 7, no. 2.29, May 2018, pp. 776-80, https://doi.org/10.14419/ijet.v7i2.29.14255.