Jalilifar, Alireza, Peter White, and N. Malekizadeh. “Exploring Nominalization in Scientific Textbooks: A Cross-Disciplinary Study of Hard and Soft Sciences”. International Journal of English Studies 17, no. 2 (December 1, 2017): 1-20. Accessed September 22, 2019. https://revistas.um.es/ijes/article/view/272781.