Heryadi, H., A. Azwardi, and S. Sukanto. “The Causality Among E-Money, Manufacturing, Services and Money Supply: An Empirical Evidence of ASEAN Countries”. Jurnal Perspektif Pembiayaan Dan Pembangunan Daerah, vol. 8, no. 3, Aug. 2020, pp. 269 -76, doi:10.22437/ppd.v8i3.9518.