Laengkang, Abd Ganing, Ab Razak Ab Karim, and Rohaidah Haron. 2020. “Speech Act of Commissives and Expressives: A Case Study on the Speech of Tun Dr. Mahathir in the 1MDB Issue”. International Online Journal of Language, Communication, and Humanities 3 (2), 73-91. http://103.101.244.124/journal/index.php/insaniah/article/view/97.