APA Style

The Analysis of English textbooks "Challenges Students Book 2 and Challenges Workbook 2" in level of teens step up at ILP (International Language Program). (2020). Jakarta: STBA LIA.

MLA Style

The Analysis of English textbooks "Challenges Students Book 2 and Challenges Workbook 2" in level of teens step up at ILP (International Language Program). . Jakarta: STBA LIA, 2020. Skripsi.