Deliana, and Amanda Fransisca Gultom. “Collocations of Effective and Efficient in COCA: A Corpus Analysis”. International Journal of Culture and Art Studies 9, no. 2 (October 31, 2025): 117–126. Accessed December 18, 2025. https://idjpcr.usu.ac.id/ijcas/article/view/22811.