Estolano, Patrick Joseph L., and Antonio H. Chua. “Spontaneous Passage of Ingested Coin in Children”. Philippine Journal of Otolaryngology Head and Neck Surgery 30, no. 2 (November 19, 2018): 30–33. Accessed November 21, 2024. https://pjohns.pso-hns.org/index.php/pjohns/article/view/345.