CM Simatupang, Ervina, and Anum Dahlia. “Noun As Modifier in Nominal Group: A Functional Grammar Approach”. International Journal of Engineering & Technology 7, no. 4.34 (December 13, 2018): 331–335. Accessed May 5, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/25306.