PENGARUH LONG-TERM DEBT TO EQUITY RATIO (LDER), DEBT TO TOTAL FIXED ASSETS RATIO (DTFAR), PAJAK, INFLASI, RISIKO BISNIS, DAN CURRENT RATIO (CR) TERHADAP RETURN ON ASSETS (ROA) PERUSAHAAN YANG TERDAFTAR DI JAKARTA ISLAMIC INDEX PERIODE 2012-2016 - MUHAMMAD NASHIKH, 041311433043 (2018)