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 & Technology, vol. 7, no. 2.29, May 2018, pp. 776-80, https://doi.org/10.14419/ijet.v7i2.29.14255.