Sri Rahayu, M. F., R. Rustono, and H. Haryadi. “Violation of Cooperation Principle in the Discourse of Student WhatsApp Groups at Vocational High School PIKA Semarang”. Seloka: Jurnal Pendidikan Bahasa Dan Sastra Indonesia, Vol. 11, no. 1, Apr. 2022, pp. 68-80, doi:10.15294/seloka.v11i2.55951.