Analisis pemahaman konsep dan penerapan ketentuan perundang-undangan tentang perkoperasian pada kasus Koperasi Serba Usaha Langit Biru: analisis putusan nomor 162/Pdt.G/2013/PN.Tgr, putusan nomor 51/Pdt/2016/PT.Btn, dan putusan nomor 222/Pid.Sus/2013/PN.T = Analysis of understanding concept and application of regulatory provisions on cooperation in case of cooperative business Cooperation of Langit Biru: analysis of decision number 162/Pdt.G/2013/PN.Tgr, decision number 51/ Pdt / 2016 / PT.Btn