Analisis penerapan PSAK 30 dan isu penerapan konsep joint project IAS 17 tentang sewa dalam kebijakan menentukan segmentasi pasar pada perusahaan pembiayaan (leasing): studi kasus pada dua perusahaan pembiayaan di Jakarta = Analysis implementation of PSAK 30 and issue implementation of joint project concept IAS 17 on leases to decide market segmentation policy at finance companies (leasing): case study with two finance companies in Jakarta