Tinjauan Yuridis terhadap Implementasi Prinsip-Prinsip Koperasi dan Tanggung Jawab Pengurus pada Koperasi Berbadan Hukum (Analisi Kasus: Putusan Nomor 83/Pdt.G/2011/PN.JR) = Juridical Analysis toward the Implementation of Cooperative’s Principles and The Responsibility of Cooperative’s Board in Incorporated Cooperative (Case Analysis: Decision Number 83/Pdt.G/2011/PN.JR)