Nasution, A. T., M. A. Ansori, A. A. Andari, J. Pribadi, and M. Kholil. “GUPPI Educational Institutions (1968-1992)”. Yupa: Historical Studies Journal, Vol. 8, no. 1, Mar. 2024, pp. 226-39, doi:10.30872/yupa.v8i1.3150.