INFLUENCE OF PARENTS' SOCIO-ECONOMIC STATUS AND VOCATIONAL LEARNING MOTIVATION TO LEARNING ACHIEVEMENT IN THE LESSON OF CHASSIS AND POWER TRANSDUCTOR FOR XII GRADE STUDENTS OF LIGHT VIHICLE ENGINEERING DEPARTMENT OF SMK PIRI 1 YOGYAKARTA IN ACADEMIC YEAR 2013/2014 (peer review) - Tarto Sentono, Universitas PGRI Yogyakarta (Universitas PGRI Yogyakarta, 2014)