Akibat Hukum Perjanjian Jual Beli yang Mengandung Cacat Tersembunyi terhadap Perjanjian Fasilitas Kredit dengan Jaminan Kebendaan Fidusia dalam Mekanisme Kredit Pembelian Mobil = The Legal Effect of Sale and Purchase Agreement Contains Hidden Defects to Credit Agreement with Fiduciary Collateral Agreement in Car Purchase Credit Mechanism.