Ashar, S. R., dan I. Irfan. “ENTREPRENEURIAL SMEs SURVIVING IN THE ERA OF MILLENNIALS AND LATER PERIOD: PROMOTING INVESTMENT GROUP (PGIs) AS SOLUTION”. Jurnal Iqtisaduna, Vol. 1, no. 1, Agustus 2019, hlm. 60-68, doi:10.24252/iqtisaduna.v1i1.11811.