Prayati, Z., H. Haerazi, L. A. Irawan, and R. M. Vikasari. “ Developing Culture-Based English Instructional Materials to Improve Students’ Thinking, ELT Achievement, and Classroom Interaction”. Lingua Cultura, vol. 14, no. 2, Dec. 2020, pp. 211-8, doi:10.21512/lc.v14i2.6650.