Sriwarakan, S. “Friendship Across Ethnic Boundaries in John Boyne’s The Boy in the Striped Pajamas and Daniella Carmi’s Samir and Yonatan”. Journal of Letters, vol. 49, no. 2, Dec. 2020, pp. 21-48, https://so03.tci-thaijo.org/index.php/jletters/article/view/186306.