1. The process of learning;Biggs,1993
2. Instruction sheet for the teachers performance criteria questionnaires (TPQC);Cheffers,2000
3. Pedoman penyelenggaraan UN kompetensi keahlian SMK tahun pelajaran 2011/2012;Direktorat Pendidikan Menengah Kejuruan,2012
4. The relationship of learning motivation and achievement in EFL: Gender as an intermediated variable;Feng;Educational Research International,2013
5. Educational research: Competencies for analysis and applications;Gay,2009