Hermawan, D., Pasaribu, F. R. H., Gustryan, M., Fathony, M., & Santiago, F. (2026). Legal Efficiency and Population Control: Analysis of Indonesia’s Family Planning Programme Based on Richard A. Posner’s Theory. JURNAL ILMIAH GEMA PERENCANA, 4(3), 2015–2032. https://doi.org/10.61860/jigp.v4i3.347