S. Hartati, R. Juwita, E. Karim, and K. Bayu, “Structuring Models and Characteristics of Informal Sector Traders in Indonesia (Case Study in Informal Sector Jakarta City, Indonesia)”, JSDS, vol. 6, no. 1, pp. 24–31, Mar. 2015, doi: 10.22610/jsds.v6i1.832.