Wuryani, T., and A. Nuryatin. “The Friendship’s Values in Teenlit Dealova, Rahasia Bintang and Tetralogy “Kosan Soda” by Dyan Nuranindya”. Seloka: Jurnal Pendidikan Bahasa Dan Sastra Indonesia, Vol. 8, no. 1, May 2019, pp. 73-80, doi:10.15294/seloka.v8i1.30656.