Bulwayan, Ronald B., Divina Alunday Balocnit, and Jessie Grace M. Sannadan. “Piper Betel and Areca Nut: Interfacing Cultural, Communication and Ethno-Therapeutic Knowledge As Reflected in the Kalinga Epic, the Ullalim”.
International Journal of English Literature and Social Sciences (IJELS) 8, no. 3 (June 26, 2023). Accessed May 1, 2025.
https://journal-repository.com/index.php/ijels/article/view/6447.