Luciana, N. L. R., N. N. Padmadewi, L. P. Artini, and L. G. R. Budiarta. “Teachers’ Readiness in Inserting the 21st Century Skills in the Lesson Plan in Teaching English”. Jurnal Pendidikan Dan Pengajaran, vol. 53, no. 2, July 2020, pp. 168-83, doi:10.23887/jpp.v53i2.26406.