Maksum, S. K. D. M. “The The Assertive Illocutionary Act of Khatib’ Islam Preacher’ in Friday Sermons in Baiturohim Mosque of Surakarta”. Journal of Pragmatics Research, vol. 6, no. 2, Oct. 2024, pp. 206-2, doi:10.18326/jopr.v6i2.206-226.