Saputra, H., Aresta, B., Sundara, T., Stephane, I. and Maltaf, L. 2021. Blockchain-based diploma information system development. INVOTEK: Jurnal Inovasi Vokasional dan Teknologi. 21, 1 (Feb. 2021), 37-44. DOI:https://doi.org/https://doi.org/10.24036/invotek.v21i1.833.