Adi, Wiruma Titian. “Symbol and Theme on Robert Frost’ Poem by Using Biographical Perspective”. LINGUA : Jurnal Bahasa, Sastra, dan Pengajarannya 17, no. 1 (February 24, 2020): 15-24. Accessed April 26, 2024. https://lingua.soloclcs.org/index.php/lingua/article/view/621.