Malapo, Frenz Ruzzel, et al. “Comparative Study Between Personality Traits of Only-Child Students and Those With Siblings Among Grade 11 Students: An Emerging Guide”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research, vol. 2, no. 1, Apr. 2020, https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/2463.