Gaya APA

Ph.D, D, B, T, P, D, C, F. (2023). 21st Century Skills in Language Education (Cet. 2). Yogyakarta: Pustaka Pelajar.

Gaya MLA

Ph.D, Dr., Bernie, Trilling,, Ph.D;, Dr., Charles, Fadel,. "21st Century Skills in Language Education". Cet. 2 Yogyakarta: Pustaka Pelajar, 2023. Text.