Soekirman, M. ., and F. A. . Suryani. “Efforts to Increase Marketing Performance of Small and Medium Enterprises in Central Java, Indonesia”. INOBIS: Jurnal Inovasi Bisnis Dan Manajemen Indonesia, vol. 4, no. 1, Dec. 2020, pp. 11 -19, doi:10.31842/jurnalinobis.v4i1.162.