Hariyanto, V.L. et al. 2020. Implementing Multimedia-Based Integrated Learning of Concrete Construction and Entrepreneurship to Improve the Students’ Entrepreneurial Spirit. Jurnal Pendidikan Teknologi dan Kejuruan. 26, 1 (Apr. 2020), 63–75. DOI:https://doi.org/10.21831/jptk.v26i1.28157.